used proac 2.5's - ~$2500, used proac 3.8's - ~$4k, new newform research r645's - $2265 delivered, 30-day in-home trial, ewe pay to ship 'em back if ya don't like 'em...
re: sub - get another one to match if ya wanna have the best soundstaging for 2-channel audio - ya need two subs, imo...