They are all good! The June issue of Maximum PC (not online yet) reviewed 6 latest SSD's. Corsair was not reviewed & I see a Corsair Recall or their 120GB Force Series 3 SSD, for Stability Issues.
The AS SSD Read speeds of their reviewed ones are:
OCZ Vertex 3 506 MB/s, Crucial m4 = 407 MB/s, Intel 510 = 483 MB/s, Plextor M2 = 387 MB/s, OCZ Vertex 2 6Gb/s = 208, Ocz Vertexl 3 3Gb/s = 267.
Hopefully that will give you a basis for comparison of how the latest stack up