I'd go with Vertex 3 or the C400.
I'm not sure about the aggressiveness of trim recovery on the C400 but I can say without doubt that the previous throttling/slow recovery issue with the older Sandforce controllers has been nearly eliminated with the V3.
I pounded my 240 with 140GB incompressible data sets with a nearly full drive and they stay near full speeds. In fact, it's so good I would even prefer an upgrade over my V2's running on sata2.
These V3 drives stay full throttle almost all the time now which was the only dislike I really have with them. V3 will surely take the overall medal once the dust settles.