Need some help picking an insulation for my lager chamber

Hey guys, I'm building a lager chamber... I've got all the wood put together (but it looks like CRAP! <----never took shop!) and now it's time to put in the insulation.

Of these three what do you think is the best choice and how do you really tell?

http://www.lowes.com/lowes/lkn?action=productDetail&productId=41503-10477-41503&lpage=none

http://www.lowes.com/lowes/lkn?action=productDetail&productId=15348-46086-15348&lpage=none

http://www.lowes.com/lowes/lkn?action=productDetail&productId=15358-10477-15358&lpage=none

I'd guess that the 1in thick sheet would be better but I'm going to have to mesure the inside of my box to see if I can afford to loose 2in.

Or is there something else that would be better?

There will be quite a bit of "great stuff" going into this as well bc my cuts are DEFINATLY not straight and there are quite a few gaps...if I can get the insulation cut straight then the "great stuff" should just have to fill in the gaps between the insulation and the wood.

Thanks guys...really apprechiate it

links not working here

oh, crap...

well, doesn't matter really. I've since gotten a fridge. Thanks everyone for looking though!