If I go for Suspension Lift will it not make the Jeep a little unstable on uneven trails? Actually I don't want to do a lot of mods mentioned in the link you mentioned.I'm guessing the OP is French Canadian.
The term you are looking for is Suspension Lift that will include longer Shocks.
Read through this. There is a TON of info on what you need, how to do it and why?