monitor size doesn't matter it's its resolution that does, but yes these components will all work together
you may consider buying an aftermarket cooler, for you X6 you can get a pretty good cooler for 30ish bucks in america, so probably 25 from where your from.
I thought there are only two resolutions at 26": 1920x1200 and 1920x1080.
Which one would you recommend for a 26" screen. Do I need a new cooler if I don't overclock?