Okay, thanks for the advice, ill give more details from now on. I was thinking 500-2000 gallons (haven't got dimensions yet), racetrack shape, FOWLR (with a couple of corals, very little, not much). Also, In lots of reef tanks and some FOWLR/FO I see very beautiful lighting. In your signature you said you have a 480 gallon reef, do you have any idea whats the best/most beautiful lighting for reef (disregarding price). Thanks.
My tank is a reef tank. I used to run metal halides but switched to LED's.
For a fish only system I would use LED's or fluorescent lighting. No need for high power lighting for fish. As for LED types, there are all kinds but if for example you are planning a 2000G reef style tank, I'd budget $20,000 or more to light it properly using LED's.
That said, not sure why you would go racetrack shape unless you plan on keeping sharks. Have you even investigated the cost on a 2000 gallon oval end (racetrack) tank? I'd estimate costs around $100,000 + for a complete build out with a properly designed tank of proper thickness, sump, filtration, lighting, pumps, heating, cooling, ventilation etc.
If you are getting these ideas from the show Tanked, I would suggest thinking again. I've been in the salt water aquaria hobby for nearly 30 years now. I've owned countless shark species and even imported and resold them. I've followed that show since it's inception and I don't agree with their practices at all. They set a poor example for hobbyist's and new comers alike. Especially their shark tanks which are historically way to small depending on the species. Sadly most fish that go into tanks end up dead. Loosing a $1000+ fish due to inexperience or inadequate housing or insufficient equipment is a real concern. Especially without years of first hand experience. Contrary to what you see on TV, you don't just put a tank together, fill it with water and then drop $1000's of dollars in fish into the tank. I don't care what water, live sand or bacteria is added at the time of startup. That seems to be what you see on tanked but what they don't show is the aftermath and casualties of their practices. Also, their customer base can afford the casualties and are willing to pay for it but they are not true hobbyists. Instead they look at a tank and see it as though it's something like a picture which you would hang on a wall instead of a living eco system designed to support a specific form of life for many years to come.
Sadly, when you watch that show, what you are not told is that most of the sharks they put into those tanks will outgrow the tank within a year or 2 at most. A properly fed captive black tip for example can grow 2 to 3' in one year. Then what do you do with it?? There isn't a person around who can readily accommodate a 4-5' black tip which needs at least 5x it's own length in each direction. Even public aquariums won't touch the fish due to regulations. A 3' black tip should have a 15' long run in a straight line. If it doesn't it will stress itself, crash into the glass relentlessly and go down hill in a real hurry only to perish in a miserable death. Most of the time when I see captive black tips, I always see them swimming with their tail below their head which is a real bad sign of an unhealthy fish. People think they are neat but don't take into account tank size needs, costs, growth and what you would do with it when it outgrows your tank which with a black tip or lemon shark is much faster than you think! Like I said, they grow at a rate of up to 2-3' a year and a typical pup is around 20-24" if you can find one that small.
I know you didn't ask for that info but given that I looked up some of your post's after your PM, I figured I would put it out there.
I suspect based on your line of questioning that you are new to this hobby. Forget money, think about the life in these tanks and the attrition and casualties that us hobbyist have on fish that are collected from the oceans. Consider that 90% or more of the fish that are collected for the hobby are dead within a month or 2 from collection. 50% don't even survive long enough to make it from collection to the hobbyist and die someplace between the collection site and the retailer. 90% of the fish that are sold in stores are dead within months as well. If you really love salt water species and view them as more than just an ornament, start small and become familiar with what it takes to keep fish alive first. Then consider what ever your next step/tank will be. Don't go blow tens of thousands or a hundred thousand dollars on something that takes years to master without some real experience first. Otherwise, I can assure from experience, it will end it disaster.