Adjusting heatsink help?

pyr0_m4n

Honorable
Feb 4, 2013
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So I have a hyper evo 212 (see link)

http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099

My case has two top fans and one rear fan. Currently, I'm pulling air through the heatsink (fan on top) blowing up out the top. My main concern is that lately, without changing anything, my temps seem to have increased, possibly because the weather is getting warmer.(finally) Would I get lower temps if:
1. Pushed air through towards top (fan mounted bottom)
2. Pushed air through towards back (fan mounted right side, case fan exhaust a few inches left of heatsink.)
3. Pulled air through towards back (fans about 2 inches from each other.)

Which setup would hopefully give me slightly cooler temps. I thought of water cooling, but i'm paranoid of a line splitting and leaking all over my graphics card and board.