Just my thoughts on each; no $ values given at times. No $NP's please.
OutGamble.com - Would have loved "outbet.com", but "outgamble" doesn't have the same ring or implication... Sounds weaker, more like it is luck instead of skill, that most would like to believe it is

Still solid words - Maybe as a homosexual casino ?

Strong sale potential to an end user - I wouldn't accept less than $900 - $1,100 - and I do believe you could do more.
360FAQ.com - Strong again. 360 is hot, FAQ is universal, and your XBOX theme helps, although the 360 isn't limited to video games.
CheckLinkPop.com - Target audience is domainers, but this would be the single best domain for the purpose, :imho: $1,000 quick sale to a digitalpoint junkie or similar. The SEO folks would like this one as well, I think. Keep this one close to the vest, :imho: , although don't wait so long that LinkPop becomes the next PR (Meaningless)
XboxAction.com - Weakest of the bunch, but strong keywords. Can't say I salivate over this one, but could be that some of the others were so good, that this one pales in comparison.
UAEPilot.com - I wouldn't say "lots" moving (BIL is a commercial pilot for major carrier, and there seems to be a heavy stigma against any that leave to that area of the world right now...), but the keywords fit perfectly, and Dubai/UAE/qatar/etc (Went last year) are heavily English speaking. The plural might be a good pickup on the cheap if possible. The only major problem here is that I don't see the end user for this one... I see the "use", but not anyone willing to pay for that use. You'll need to be creative in the marketing of this one, but it's not an impossible task I'm sure!
-Allan :gl: