Yup, that'll all work nicely, you've got a good build there.
My only concern is the 550W PSU. At first I wasn't happy about the brand, though that seems to actually be a pretty good model. However, you're also cutting it pretty fine with 550W on a 275W GPU + 125W CPU. If you're never going to do any overclocking then you're probably fine. But both that CPU and GPU draw some serious power if you want to start overclocking. In which case you might be better looking at a 650W unit.
Actually, turns out I'm an idiot and the TX-650 is actually $80 after MIR. In which case spending the extra $10 for a newer design, higher quality (HX series), gold efficiency and modular PSU is a no brainer. Ignore the tx-650 suggestion.
@rhysiam, Thank you very much for your quick answer! I will look further for a bigger PSU. Indeed, I think it's smarter to take a bigger PSU because if i want to expand my GPU performance later i will run short on my 550W