XFX 7970 or Twin Frozer R9 280X

This is probably a stupid question but i have found an xfx 7970 for only £200, although the r9 280x is newer would it be worth the extra £50 to get that or not? I dont have a specific build for it yet, im gonna start with the gpu and build a system around it.

Given the good value of the 7970 shall i go with that or will the 280x benefit more in the long run?

Thanks

I'd spend the extra £25 on this (£225) --> http://bit.ly/1gMUQlO

XFX cards get HOT!

thanks cooper