I've heard the Rokit 6s. They are pretty good. Good bass but don't go very loud.
Even the Rokit 5s would definitely be a step up from the M-Audio AV40s. M-Audio BX5A would be comparable to the Rokit 6s.
I've owned a pair of M-Audio BX5A with the M-Audio SBX10 subwoofer and it was a killer computer speaker setup.
Thanks. I agree that these are awesome with their great midrange and stereo imaging. So much better than the popular computer 4.1s. I am actually ok with the lower bass. Looks like I can get a pair for around 175$. so I might just pull the trigger and sell the AV40!