Thanks piercho,
When I look a the tank, I don't even see the equipment, but then again I look at the tank 50 times a day, so those things start to blend in. I have thought about adding a bit more rock on either side to cover the powerheads more, but haven't decided.
As far as the CO2 is concerned, that seems to be the biggest negative about the system in that the cartridge is only availible through Hydor. Although, I was able to stock up with 7 of them recently, because the wholesaler who was going to carry the product recently went bankrupt, so I bought every one they had. Should last me for ~10 months...still on my first cartridge, but according to the instructions, it should be running out soon. I believe the retail cost on the cartridges was around $15, so as long as they are availible, not too bad.
Nathan