I just finished upgrading from a 9 year old Sony 19-inch Triniton CRT (4:3 ratio) to a Dell U2211H, 21.5-inch LCD (16:9 ratio).
Wow...what a difference. Colors are soooo much more vibrant and I can now see soooo much more of the aquarium without scrolling.
I'll bet some of you are thinking, now all he needs to do is buy a second monitor for the aquarium! Sorry, it will never happen - strictly a single monitor kind of guy.