http://www.newegg.com/Product/Product.asp?Item=N82E16817103512
I’d take a look at that one, power supplies are crucial now days that means you gotta shell out big bucks or your system won’t even boot up or will have various problems and possible hardware damage
your RAM is fine, I’ve heard some very pleasing things about GSKILL and read some good reviews.
As for the power supply, it’s cheap. Has high enough amps to run your system but I challenge Roswill’s credibility to provide a quality, stable Power supply. It’s just cheap.
Might work, Power supplies are a critical part of your system, I would get that last one and not use it for any lengths of time. I would save up and buy that enermax as soon as I would be able to because when cheap power supplies go, which they often do, they usually can take out and fry other pieces of hardware.