i live near there and understand the costs, still d not buy a gtx 750 ti
stop talking about bottlenecking cpu, it is not the end of the world
nothing will get broken, nothing bad happens with a blottleneck
you just get lower than possible frames per second
when you change cpu you get more frames per second, that is all
you need to think in the future, a old slow card the next year will be more slow than now, next year when you upgrade, you will see you wasted money in a slow gpu
investments must be done wisely especially when resources are limited