So I want to do a coolant flush before I drive to vegas this weekend and I was wondering if anyone had a recommendation on which coolant to use.

I just bought some "tech" af from Walmart and it looks a little weak (it's not the overpriced pre-mix, either). $7 a gallon.

I think it's worth the extra couple of bucks to go w/Prestone ($10) and mix your own 50/50 mix w/distilled water. Just make sure the colors match.