I have the Mushkin Chronos Deluxe 240GB. Its ridiculously fast and I've not had even a single issue with it in the 6+ mos I've had it. I purchased it back at a time when the sandforce was plagued with issues and it worked perfectly. It benched pretty much exactly where they claimed it would run which is not all that common really.
Thanks for all the replies.
I will be using it for Windows Boot Drive, and gaming.
I've seen benchmarks of the Intel 520, and it seems slower than the Chronos Deluxe.
Also, the HyperX Kingston seems far to expensive at £330 for just 240GB.
How about the Corsair Force Series GT 240GB (Red) SSD?