Hey all, I currently have a 670 in my system and while it still performs well in most games, it is stretched in the more graphics intensive games nowadays and it's starting to get a bit long in the tooth, the problem im facing is I know the 290x and 780Ti fight blow for blow, but what about the 290? would that be a significant upgrade over my 670, or what about the 780? is the Ti worth the money knowing Maxwell is possibly a year away (the ones that will even get near the Ti anyway) is the 290x? any guidance or just general recommendations would be greatly appreciated, thank you 
and I game at 1080p, with no intention to change any time soon to anything higher unless I have the most impulsive of impulse buys on a new monitor, but thats unlikely haha