I'm configuring a new system and I'm not sure which type of RAM to get. It's for a 2.8c/IC7 system, and I'm down to Corsair XMS PC3200 cas 2.0 and Corsair XMS PC3200Low Latency TwinX. Can I expect much of a performance difference between the two? Another issue is that I can get 1GB of the regular XMS for just $45 more than 512MB of the TwinX, which is tempting. What do ye hardware gods suggest? Thanks in advance!