Upgrades?????

[shlprk]

Hey guys,
I'm in the process of doing alot of research on the hummer3 for a future buy.
My question is for you experts.
1.Exhaust- yes or no and who makes the best?
2.Air intakes- yes or no who makes the best?
3.ECM-yes or no and i think raptorq is the only one.

So guys before you reply let me tell you what i'm thinking.
I dont want a 8 cyl too much gas. looking for a toad for my rv, and this will be used as my daily driver. I still want something with reasonable power. This is why Im looking for upgrades.
I have my eye on an 06, thinking about putting 35's on it. I know this set up will require a lift, what do you recomend?
1. Rancho 4" lift (smooth ride)?
2. Cranking up keys (very stiff ride)?

So if you can help with any comments I would appreciate it. Thanks in advance