I'd say pay a bit more and get an H77 motherboard and 8GB RAM otherwise everything else looks good.
If you're concerned about the PSU - 500W minimum to run any decent graphics card but GPU manufacturers tend to grossly overestimate their cards' power requirements.
Thank you for your reply. I've updated the build now based on your suggestions and I agree with it seeing that it was only about a $15-$20 increase. So, does everything look very nice now?