@Lurch
My Sam flex is pretty responsive, it feels almost faster (honestly) than my Windows box with an i7 CPU at 3.4Ghz and 8 cores (threads).. Unless I'm doing something really CPU-intensive tasks, otherwise it is up for the job.
However, all video decoding, heavy-websurfing, photoshopping, ripping, game-emulation (WinUAE), backuping and all that "heavy" stuff I do on my Win box anyway so CPU power isn't that big issue to me...
On the Sam I mostly code (no prolem here unless I compile a very VERY large C project (almost never)), and play some games, play music and do some "light" browsing (like browsing Amiga-forums and OS4Depot and such) and play around in Workbench and programs and so forth.. But from time to time also fire up heavy Facebook (however m.facebook is pretty snappy) or heavy Gmail to fix something and there it's noted that some more grunt in the CPU department would be very welcome...
> As for Sam boards these are rare and are out of stock.
:S Have you checked
http://amigaworld.net/modules/classifieds/> I wonder what the X3500 will go for price wise? :-)
I wonder that too

My plan is to buy X5000 once it is released...