I would go with anything that you find on Independent4x.com The owner of the company has wheeled troopers for many years now. He and his crew have designed a lot of the stuff they have especially for Isuzus. And the pieces they purchase have been thoroughly tested on an Isuzu.
Customer service is unbeatable and they have a knowledge-base second to none.
Also I like knowing that I am supporting of of "our own".

After you get a lift the very next thing that you should do is add boulder bars (rock rails, rocker bars, etc) the will protect your rig from some very nasty dents, and add a lot of confidence to your wheeling.

My .02