Is CAS2 really that much better then CAS3 RAM. I need to get me some PC133 as that is now my last upgrade I need. But I was curious to the actual beifits of say..mushkin PC133 CAS2 for $165 or the Rev2 for $194 vs. the budget CAS3 for $139. I just spent some bucks on a 700E, Gorb and a CL Geforce2 GTS and now need RAM but need some advice on the differences of the two before I throw somemore money at my system.