Most people overstate OCZ failures, purely because OCZ has the most active user forums.
No one goes to a samsung forum to report their failures, so there is no scary website with every failure all in one place which you read and then think every drive they have fails, because people who just buy, use and never have a problem don't go on support forums.
With any SSD you have a chance of a failure, a low chance, it happens, thats life, move past it. OCZ do have good RMA service, unsure of Samsung(never had to) and Crucial also have good rma service, in the UK its good to have companies who have uk addresses and quick turn around, Corsair... booo, crucial/ocz, great service.
In terms of performance, benchmarks are utterly worthless and 99% of people would be VERY hard pressed to tell the difference between most of the drives made in the past 2-3 years without benchmarks. Benchmarks mostly and ssd innovation of late is mostly improving/highlighting stuff like high depth queue read/writes, thing is, home computer use NEVER involves these situations, great speeds in benchmarks are being show with 32-64 depth queues, where as in real life home usage, depth queue rarely if every moves above 5-6, and in most cases is lower than that. Benchmarks have zero relavance to home usage.
Likewise most people "upgrade" to a new drive off an OS install they've had for anything from 6 months to 3-4 years, and as such moving from a used/messy state, dodgy install with loads of patches on patches on patches, to a new install on a new drive and see a difference. But most of that difference would happen if they just reinstalled windows.
Get whatever is cheapest of any drive in the past 2 years, it won't matter, more space > more speed anyway. you fill the thing above 50% speed drops, fill it above 70-80% speed drops even further. 120gb drive is emphatically worse than a 180gb one, even if benchmarks show otherwise on an empty drive, actually use the thing, install games, and fill it up, boom, speed disappears anyway.