The Nforce2/AMD version does sound better and more modern:)
Same Hammer/Prescots are around the corner, but those Shuttles are quite upgradable anyhow.
There are many other Mini Pcs with similar tech/performance but overall the Shuttles seem to do everything the best:)
Check this dedicated forum for more info:
Also these two new hot mini Pcs which are coming out soon also:
Plenty of info at that dedicated forum though...