So, I'm running a 256GB Vertex 4 at the minute, and my rig is first and foremost a gaming rig, but I also tailored it so it doubles up as a recording rig. Now, I'm gonna chuck a 120GB/128GB SSD in as a secondary for VST's (especially space hungry stuff like Superior Drummer). Will a fast read/write really matter? Looking at picking up a cheap OCZ Petrol, as it's 300MB/s+ read and 130MB/s+ write. That should be fairly bang on? I'm looking for as little latency as possible (and I don't want to use a HDD, I'm going completely HDD free in this rig soon).