Are my Antec Kuhler H2O 620 temperatures too high?

Hi, my rig is

i5 2500k @ stock speed
ATI Radeon 5870x2 Crossfire 1GB VRAM
16GB Patriot Gamer Series 2 RAM
160GB + 160GB + 250GB HDD
OEM HP xw9300 750W PSU
OEM xw9300 case
Gigabyte Z68X-UD3H-B3 v1.3

I according to HWMonitor, I get a package temperature of 37 degrees, with all of my cores at 33 except one, which is quite a bit higher at 38-39.

Are these temperatures to be expected? Did I mount something wrong? Thanks.

Here is a picture of my machine: http://picturepush.com/public/10085612