The thing with the Sandforce is it wasn't a small problem it was a problem for like 6 months after it launched till it was fixed, which is also why the OCZ RMA numbers are worthless because they were first out with Sandforce, and sell a higher volume than most of the others, but all the other companies that made them had the same issues, Intel included. The worse thing is OCZ released something not blind, but early as they often do, and a lot of their users know they are almost beta testers, they've built a reputation and following on people liking OCZ giving them first shot at new controllers/tech/memory. But that means most of the other companies knew about the bluescreen issue and still launched their stuff, OCZ did it stupidly before it was fully known about , Corsair, and the rest have no such excuse, Intel released theirs around the time the fix was done.
In terms of RMA, there are some worrying threads on Intel forums and elsewhere about I think its 320's dying by the bucketload, with dozens of people having 3-4 drives fail. Haven't read any more about it, could be a specific combination of parts causing it and everyone else is fine.
Samsung are the best cheapest drive, Vertex 4's are faster, but cost significantly more, Vertex 3 might be marginally faster but was also more expensive most of the time. THe agility is async memory which in particular suffers from worse performance as the drive fills up, sync memory ssd's have the issue but it seems less bad, pushing 70-80% capacity reduces performance, async ones it seems to occur at 40-50% which.... well paying for 256gb and having the ability to only use half of that at full speed is a con, all to save £5-10, Agilitys aren't worth it.
Crucial are great, Samsungs are great, with no particular downside, but Samsungs were noticeably cheaper for a long time, first drives to hit the £140/256gb mark and do it frequently.
