Jeep cherokee, 3 inch vs 4.5 in lift kit?

I am buying a jeep cherokee and will be getting a lift. I will be doing offroading but nothing to extreme. Ill be going through mud and dunes a couple times this summer. I was wondering if the 4.5 inch kit by rough country is really worth the extra 200 dollars. But i also here about death wobble and that you have to replace brake lines. I want to keep this pretty cheap. heres what im looking athttp://www.roughcountry.com/jeep_xj_3x.html I was wondering the difference between that and this http://www.roughcountry.com/jeep_xj_3.html IS this all I need to lift it? Also even if I got hte 3 inch now and wanted to upgrade more later I could just buy a body kit......So do you guys think I should buy a 3inch or 4.5 inch. This IS a everyday driver. I dont want to sacrifice offroad capabilities though. Im most ikely getting 31's also. Thanks