The OCZ drives will always be cheaper than competing SF-based drives because OCZ has a sweetheart deal with SandForce, meaning they get a discount and they are able to provide firmware updates sooner than the others. Corsair generally has a very good RMA and customer service, as well as Mushkin.
The Force 3 is equivalent to the Agility 3 drives, which both have async NAND ram. Same exact drives but the OCZ is cheaper because of the sweetheart deal. The Vertex 3 and Corsair GT series are faster than the async counterparts but also a bit more expensive, again, the OCZ vertex 3 being cheaper than the rest. The sync NAND ram counterparts are slightly faster than the others, maybe 20-30MB/s?
The Corsair Performance pro series is Marvell-based, same exact drive as the Plextor drives. If you want the best overall performance from an SSD along with great reliability then buy a Plextor M3S (5 year warranty) or a Samsung 830 series drive. Both of those will fair better with uncompressible data but they're both more expensive.
If I were to buy another drive right now it would be a Plextor M3S. Cheaper than Crucial, quick as hell and great warranty.
Btw, your link for the marvell drive is a 64gig one. If you're buying Marvell go with Crucial or Plextor. For some reason the Corsair drives are priced too damn high.
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