Go Launcher all the way. Altho not as fast as I would like you cant beat the customizations...
I've changed it up lately and am using lightning launcher, aweeeesome!
Neutrinos cm7 or turl cm9 (M)atrix
Adw EX Launcher : you can argue with it it's just the fastest; it's SUPER snappy. Go Launcher is full of options but it get slower and slower. Like most of the Go Team products : starts great then it goes in all directions and becomes a factory...
Try scrolling the app drawer in vertical mode in Go Launcher then in ADW...and feel the pain for Go.