Which inflatable to get?

[chiefams]

I have been using a walmart self-inflatable inside my ENO singlenest and it finally died on me after only a few months use. They would not take it back and I though it would be a great time to upgrade into something that might last me a longer time, and give me a greater range in temperatures because winter is coming up. So I am definitely going to be investing in a Speer SPE and I needed some advice as to which inflatable pad would go inside

side note: I have used CCF pads and they make me sweat A LOT. I am a warm sleeper at around 235 lbs so I have a lot of natural insulation

I have been looking at these two:
http://www.rei.com/product/778147

and

http://www.rei.com/product/778144

Both are in my price range... but the first is considerably warmer- at least according to R-value. Bulk/weight is not really a problem for me. Can I assume that 1.75" thick one would be warmer? I had done some reading a while ago and someone said that the inflatables are terrible for inside the hammocks because of the foam that is in them. I just need to know which one used in conjunction with the SPE, would be better.

EDIT: Or if you have any recommendations of others for me around that price range!