The new design is definitely cleaner and faster. Keep up the good work!
While it was probably technologically inferior, I did like the original v4 design. It relied a bit heavily on frames, though, which some older browsers (even back then!) didn't handle so well. Most notably, Netscape 4.x (I think? It's been so long I don't remember now. I do remember that it worked best on IE 5 and 6, though).