Lightweight pdf renderers

I'm finishing up dissertation data collection in the next ~6 weeks, which means I'm going to be spending a lot less time writing code, and a lot more time analyzing data and writing papers. So R and laTex are going to be my new best friends.

Taking a good look at my workflow around these packages, I realized that viewing pdfs was really slowing me down. Every time I generate a graph or paper, I have to open up the pdf version and see what it looks like. Adobe's very bulky software takes several seconds to load -- very frustrating when you're playing with margins or table formating and want to iterate quickly.

So I went out looking for a lightweight pdf viewer. Here's what I found:

http://www.downloadmunkey.net/2008/04/random-monday-foxit-reader-vs-pdf-xchange-viewer-vs-sumatra/
http://portableapps.com/node/17260
http://www.techsupportalert.com/best-free-non-adobe-pdf-reader.htm

Any other advice?

Based on those reviews, I'm going to give PDF-XChange a shot. I'll let you know how it goes.