Help me improve my Bitfenix Prodigy temps

stock clocks, full load under LinX my cpu (i5 3570k) is about 67c. Seems kinda bad even if the prodigy isn't a super big case

aftermarket cooler: Dark Rock 2
Rear Exhaust fan: Noctua NF-P14 FLX 140mm Case fan
Front intake fan: BitFenix Spectre All Black 230mm Case Fan

I tried removing the front panel but it didn't do anything, my graphics card is a small HD7850. I think I did the thermal paste poorly (any tips on this?)

are these temps the norm for this? Do you think I'd be able to get a small/decent OC with it?

Remove dhat IHS.