One of the beauties of root is that if you don't like something, you're free to change at a whim. Give CM7 a shot and if it's not your thing after a couple of days, try something else.
MIUI is quite iPhoney with the icons and the dock, but is quite slick apparently. It's popular so it must have something about it, but it doesn't float my boat.
There's one called RCMIX3D, that's based on the ROM for another phone (the runnymede apparently) and running Sense 3.5. It might be worth a look in?