If you have the $ to spend, Warn makes great stuff and to have everything in one package is nice. but there are a lot of good winches out there, for me I went with a $300 smittybuilt #8000 winch and bummed air off Ed for the last few years, but you can pick up a power tank for around $300 or so, or just a VIAIR compressor for less.
Here's a good write up on the different on board air setups, it's a little old but has some good info,
http://www.parksoffroad.com/prodreview/inflatortest/inflatormain.htm So what do you want, an easy to install all in one unit that costs alot, or seperate units which should save you $$ but require more time and effort to install?
Just my two cents, but hope it helps...