Unless you need yesterday, I'd wait and monitor Newegg (subscribe to email alerts) for the Samsung 830, or the Crucial M4 to go on sale for that price.
Both are good preformers and have an excellet Reliability/low user problem track record.
Have:
.. Two 128 gig M4'2 plus one 256 Gig M4 (paid $180 @ newegg on sale)
.. Two 128 gig Samsung 830s plus one 256 Gig 830 (also paid $180 @ newegg on sale)
.. Two 120 gig Agility IIIs - OK a guy is allowed one mistake!!!
.. Bought the 256 gig Samsung 840 Pro, but have not installed yet.
I do Not recommend the Crucial M5.
.. NO to any Asynchronous based SSD unless At a great sales price, or that is all you can afford - they are still much faster than a HDD - just do not perform any better on Sata III than if you place them on Sata II
.. Not a lover of Sandforce SF22xx based SSDs, much prefer Marvel based and Samsung based.
.. OCZ - I just do NOT buy. THIS is a Personal decission as I DID not like their attitude toward customers when they were selling Sata III SF based SSDs that were causing all kind of problems.
As to the "standard" Samsung 840, Mixed feelings, Reason I'd recommend the 830 which on sale can be the same price. Also feel the 840 is over priced. Hopefully the 840 pro will come down in price. Sale price for the 840 pro should come down to say $20 more than sale price for 830 or M4.
Added:
The_Assassin (you posted while I was writing)- And that is the Price point I just stated would make the 840 pro an ideal choice.