I just checked eBay and the Intel Q9000 is going for ~$75. As for the memory, 8GB is the maximum allowed.
Router(Nokia IP390,4GB RAM,4x GigE SFP Ports,4x 10/100/1000mbps Ports,OpenBSD 5.5)
MyWS(Phenom II X3 720 BE@3.3GHz,8GB RAM,2TB+2TB+1.5TB HDDs,GFGTX560Ti,LG WH12LS30 BD-RE,W7U)
MyNB(Asus G53SX-XT1,Core i7-2630QM@2GHz,24GB RAM,2x2TB HDDs,BD-RE,W7U)
MyMC(Pentium E5200@3.5GHz,4GB RAM,3x2TB RAID5,GFGT520,W7U)