I just switched from LPP, where I was using a 3-screen setup (LP Calendar and Friends widgets full screen on one screen each & folder shortcuts on the centre screen), to Go Launcher EX plus Pure Calendar & Pure Messenger.
On the widget front, Pure Calendar and Messenger have loads more options that the LP widgets and they're skinnable, so no comparison there. Those 2 widgets are well worth the 3 or so quid I spent on 'em.
As for functionality, Go does everything I used LPP to do incl. animated screen transitions, swipe gestures & unread message notifications on the dock and has some extras (more functional app drawer & ability to move homescreens around in helicopter view).
I still have LPP installed (as I paid for it) but unless the future updates that the dev's got up his sleeve blow Go out the water, I think I'll stick with the switch.