The solanas are great tanks. I've seen tons of people with them and none have complained about the tank or the whole setup in general. They actually are very nice tanks, and 34G is a great size to start, or to even use forever. I plan on using my 25G forever.. lol. Maybe when i get my own place i could upgrade to a larger cube.. but not much larger than 50G.
The solana comes with a 150W HQI MH
bulb so yeah, that light would be excellent for any coral you wanted to keep. However, any of the more light-demanding SPS
would need to be placed in the upper half of the tank, since 20" of water is still a lot of water. I'll be running a 150w HQI MH
pendant as well on my 18" high tank, and i also need to put SPS
on the upper half of the tank.