For piso-piso, ok ra man siguro kanang A4 kay dili man graphic-intesive/demanding kaayo ang mga apps for piso-piso unless it's for piso-piso units on a full-blown lanshop. For that purpose, the 775 set would be more practical since it has a dedicated vc.
My thoughts on an sff rig, i'd be partial to the G620 on the basis of power consumption since on my requirements (not sure with others) the rig would spend most of its time on P2P DLing. Though a sandy-atom netbook would be more appreciable. But let's wait for the Llano reviews to pour in..