The 7870 is better value (and comes with the Never Settle: Reloaded bundle, dont forget that) but the 760 is the stronger performer. Whether the increased cost is worth the increase in performance is up to you.
I used to run a 7870 before upgrading to my current 7970, you can get get high-ish settings at 1080p in intensive games while still getting a stable 45FPS while playing. Obviously you will need to lower the performance killing settings like AA and Post-Processing.
7870's overclock pretty well too, you can get a fair bit of extra performance from them.
They might have run out at AMD HQ, but individual retailers might still have stock.
Damn man, that's unfortunate. Though 30 Euro for three AAA games is still a good deal. You might be able to get them cheaper by buying from people selling off their codes, I bought some games from this guy and can give him a good recommendation. http://www.tomshardware.com/forum/id-1675631/wts-wtt-am...