Faster for less money? What planet are you on? The XT is £50+ more than the standard 3600 lol. Edit: If you're referring to the motherboard, that's not an issue I never said anything wrong with it.
Both CPUs have overclocks, 3600 is @ 4.3 and 3600XT @ 4.5GHz in that video...
If you're referring to the RAM speed, then 3200 -> 3600MHz isn't going to give you a huge FPS increase either. But the RAM suggested is 3600MHz anyway.
Bottom line, 3600XT is poor value for money and will not give a huge benefit in performance either that's remotely worth over £50.