CodenameHaswell :
clutchc :
I'd opt for the 1st one. The faster card will make the difference... all else being equal.
Yes, but don't you think the Athlon will hold the 270 back?
I really don't think so. Here's what I'm basing that on...
The Athlon X4 740 quad core is roughly the equivalent of the Intel Q9550 quad core (or slightly faster) when it comes to gaming according to Tom's hierarchy chart:
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html
The R9-270 is basically the HD 7870 re-badged. I used to have a Q9550 and an HD 7870 in an older rig. They were pretty evenly matched, at least in the games I tested. The CPU and GPU would run at 90%+ usage when really loaded. So, I'm thinking the 740/270 would be about the same.
The i3-4150 would probably be a better processor for upgrading the gfx card in the future or moving to an i5, but if the OP is a gamer and not so much a builder/upgrader, he would probably get more instant satisfaction from the 1st choice. But yes, choice 2 would have better upgrade potential. So that is a point the OP should consider.