Select some Corsair or Kingston ram, those are usually good quality.
Dont cheap out on things like the motherborad, ram and powersupply - it will only make the system more unstable.
Your powersupply seems like a good choice, the rams would benifit from being upgraded to corsiar/kingston, as mentioned.
I have little experience with AMD system combos as i usually choose INTEL, so i cant comment on the motherboard.
If you want are more silence PC, it would also recommend to choosing a different cabinet/case - if you went for the look, then its fine i guess.