Rough Country Lift advise please....

I have a 97 cherokee 4.0 4x4 with 30 inch tires on it. It has original suspension. I do not do any rock climbing or real hard core off roading. I do tow a trailer often that causes my rear (of the jeep... lol) to drag close to the tires. I was wanting to add a cheap lift and I was told that Rough Country was a good choice. They offer 2 choices for what i am wanting.

3" Suspension Kit
Entry Level Suspension
$255.95

or

3" Series II Kit
Includes Control Arms
$345.95

THE ONLY DIFFERENCE IS THE CONTROL ARMS for 90 bucks..

A few questions are:
1. Which one should i get, or should i get something else?
2. Do i have to worry about Death Wobble? or whatever its called, or is this for highier lifts?
3. Will doing this 3 inch lift mess anything else up? Alignment?

I have never done this but i saw a video about it and it looked easy. What do you think..

I also was told I could just add another leaf spring only and get a 3 inch lift in the back but i am not sure i want it unlevel. Any thoughts or coments.

Please if you reply make sure you spell out any abbreviations for me becasue i am new to this and i will not know what you are talking about.

Thanks in advance.

My son and I did a 3" Rough Country on his 99 cherorkee. I had never done a lift before, and it wasn't too difficult. My only advice would be to drench every bolt down with liquid wrench before starting. It seems like we broke many bolts. Be patient, and take your time. The rear shocks were bad, broke most of the bolts, ended up cutting through his floor to access the bolts. If you are fairly handy with tools, you can do it.