I just stumbled across this today and so far I really like it. I was using the Trebuchet launcher on Thor's ICS v96, and although it does have a lot of customization it is slightly laggy. So far Go Launcher HD is running super smooth with no noticeable lag.
http://golauncher.goforandroid.com/2012/03/go-launcher-hd-v1-0-beta/
http://golauncher.goforandroid.com/2012/03/go-launcher-hd-v1-0-beta/