If Kubuntu is similar to Ubuntu in packages, then I wouldn't recommend Ubuntu. Before, I installed Kubuntu Flight 3 (a dapper release) and it supported the rt2500 driver, but when I degraded to Kubuntu 5.10 to install automatix, it didn't. It detected my texas instruments wifi card and ethernet card, but I couldn't enable either of them.. I had this problem in Flight 3, but I was able to fix it. And of course, I had the same problem I had back in Warty, where it didn't setup my display correctly so I had a text login (although I knew how to fix it). And then there's no gcc installed so I can't exactly compile my drivers once I copied then over from my windows partition. But who knows, Ubuntu is probably better with all this.
Everything was easier to work with in Suse, only reason I'm hesitant to switch back is because I want access to more packages in regards to repositories.