Good choice! As far as quality goes you can't beat ATI. 8 bulbs would be great for sps and lps on the bottom. Diehard sps, you'll want a 10 bulb. I think 12 bulbs might be too much but I might be wrong. You could put two 6 bulb 48'' fixtures but I don't know if you want to do that. You can check both out on reefgeek.com, I can't post a link right now because I'm on my phone but I'm sure someone can help. But if you want to save a little; premiumaquatics is having a mobile texting club and when you sign up your next purchase is 5% off so I'd consider that so you can save around $50 or so if you want and also premiumaquatics doens't charge heavy shipping fees, just extra on bulbs. I'll look for a bulb combo that would work and I'll post back. The options are endless. What color are you looking for, 10k, 14k, 17k, 20k?