Jeeper Looking to buy a used Hummer...suggestions?

[InneedofHummer]

I am looking at used 03'/04' or maybe a 05' H2 Hummers because they are more in my price range. I may have to wait to buy one, but I want to know if one year is preferred over another. I also want to know if there are some must have features or options that I should look for. I hope to get one by next year. I am thinking of selling my Jeep and getting a Hummer. I don't think I can afford a new one, but have seen some good deals on used H2's. I have heard they rattle some, is there anything else I should know? I appreciate your feedback, as I have never even been in a civilian Hummer.