I have tried Ubuntu years ago, but this time I was seriously impressed.
The LXDE/OpenBox environment does not have any frills but is fast and functional and appears to be more stable than KDE 4.5 at the time of writing (December 2010). The system boots more quickly than openSuSE. Time to desktop is 23 seconds when using the supplied 5400rpm hard-drive (HD), and just 13 seconds when using the Wintec Filemate SolidGo solid-state drive (SSD)! The roughly equivalent times for openSuSE (11.3) to reach the login screen is 34 seconds with the HD and 15 seconds with the SSD. Time from GRUB/Burg boot manager to finish loading a web-page (Chromium or Firefox) is even more impressive, at 31 seconds with the HD and just 18 seconds with the SSD! Actually, both Chromium and Firefox are open before the 18 second mark, but the network is not quite ready until 18 seconds is up! (The comparative time for Firefox in openSuSE 11.3 is 77 seconds with the hard-drive and 32 seconds with the SSD. However, my openSuSE installation uses KDE, which I think is much, much larger than LXDE).