Well, I would estimate that your computer, with all the possible upgrades you listed(including crossfire), would draw around 575watts at full load. So, you'd have plenty of headroom with a 750watt power supply.
As for the ones you listed, the cheapest one there, the OCZ EliteXStream, is a very high quality unit.
Read the review at HardOCP.com.
Or, if you want a full 800watts, the BFG ES-800 power supply is a very good quality power supply, and is rumored to have been designed by Jon Gerow(aka Jonny Guru of JonnyGuru.com, a great power supply review site).
Read the review of this unit, also at HardOCP.com. As you can see in the reviews of those power supplies, both power supplies earned the HardOCP gold editor's choice award, one of the most sought-after awards in the power supply industry.
In fact, looking through the reviews of the power supplies you listed, it would seem that every single one that you picked out has won the HardOCP gold editor's choice award. You seem to have picked out the best of the best there, nicely done.

So, any one of those would make an excellent choice.
Also, the Corsair TX 750watt power supply that Alfador linked is another great choice, although that unit isn't quite as good as the other ones for 3.3v regulation. It still stays within spec, but not as tightly as the ones you picked out.
If you'd like a good way to quickly check the quality of any other power supplies you see on sale, you may want to look at
the Eggxpert tiered power supply list. It's a good starting point, before you take the time to start searching out web reviews.