the RAD layout looks a lot better though i would have the 120 as an exhaust being top and back, if you do that with a strong push/pull config i would go against convention and have the top fans pulling into the case to cool the mobo/ram.
As for the PSU the members are right but i have seen many rigs with cheap PSUs last years, if you cant afford anything else the least i would do is run it at stock until you can get another one.
Also i have seen a few suggestions of 850W PSU, this really isnt needed unless you are going sli/crossfire 600W should be fine for your needs and any reputable make would be fine.
You have to remember most of us have made mistakes on builds (and paid the price) and even though some of the posts have crossed the line from advice to snide comments on the whole we want you to have a great PC.