Well, I must say I love KDE 3.5 but as KDE4 doesn't work with separate X screens I can't really test it well ! I'm now under a Debian Sid with Gnome ! Not bad, but still I prefer Kde applications (digikam, kaffeine, and of course amarok)... See yu mate !
KDE4 is nice but I can't use it for the moment ! Too many features are missing for me in comparison to KDE 3.5 ! But well, it's a great environment anyway, so I'll wait and hope for new things while gnome is not much more satisfactory for the moment... just working all right ! Or I'll find some other ways progressively and shift to SID, that's what cool with Linux !
See yu mate !