I will second what Albert says as he is my go-to person for anything and everything reef related.
I enjoy my 20 gallon BB tank. The maintenance benefits alone make it worth it as I don't have to go hunting in the sand for detritus.
For aesthetics, I keep alot of frags on the bottom so whether it's on sand or glass does not make a huge difference if I don't see it.
This is a local reefer's barebottom tank. The picture alone will be enough said:
