My new pc will feature 2 128gb ssd's in raid 0. My question is should I go with 2 830's today while they are on sale for $80 each or wait for the 840 pro and get them at $150 (maybe more maybe less when they are released)? Is the performance increase worth roughly $140?
I would go a single 256 GB device, works pretty good, performance of the 256GB is better then the 128 GB drives. You have no problem with trim.
Currently I would go with the 830 until 840 Pro hasn't become a little cheaper.