Aopen PS is good, high quality, but 250W is not enough for 1700+.
Codegen PS is garbage, it's as light as paper, you can get a Codegen mid-tower case with 300W PS for under $40 shipped from ubid or $40 from pc-club locally, what do you think the quality of its PS would be?
a good buy is HEC 350W, dual fan, $15 cheaper than Enermax's 350W from newegg.