Heres what I would do if I were you since you want to go with the 3570k setup. To get a good rig with loads of expandability for later try doing something like this.
i5 3570k $220
MSI Z77 Gaming $140 ($130 with a rebate)
That totals to ~$360 which leaves ~140 for other parts.
Now depending on where you want to invest this money, you can put it into better CPU cooling and a case but that will be limited based on how much you want to spend.
For air cooling, I tend to like one of these personally
CoolerMaster Hyper N 520 $30
or
Xigmatek Dark Knight II $50
Of course there are lots of options, these are just examples of two I have had people use that like them.
Now on the root of liquid cooling, you have some options, but because your going to need a case, that holds back the ones you can get.
Corsair H80i $73
or
Antec Kuhler H2O 620 $74 (59 with a rebate)
or
Corsair Hydro Series H50 $60 (50 with a rebate)
Then of course we get to the cases, now depending on how much you want to spend above will add room for a nicer case. You will need a case no matter what, so make sure you get one with plenty of room for expandability based on your choices above, heres a few that would fit the budget depending and should work with everything above.
NZXT Phantom $110
or
Thermaltake Commander $40 (30 with a rebate)
or
NZXT Apollo $60
Hope this can help you out, I would try to balance the prices of the case and such to be able to afford a decent case, and better cooler. Maybe focus more on case that cooler because the cooler can also be upgraded later if you want to go higher on overclocking or such.
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hellokitty[hk]
When did I ever say bang for buck? I said Bang as in Power, not bang for buck, if we were going there, its AMD all the way.