Looking at tow rigs... what would you buy?

[Sean H]

I just took it up to Lowe's for furnace filters. Temp: 4 degrees.

It didn't like 4 degrees very much, for the first few minutes.
I let it ilde a while before I pulled out.

If you are going to leave it out in those temps, I would plug it in (or get a plug in heater installed). Helps dramatically.