I would try searching yourself before the "fire squad" shows up here and bombards you
This is one of those topics that if you are willing to do a bit of reading you will find umpteen threads with the answers you are looking for....3" SL usually will allow 33's to fit but if you stuff them up in the wheel wells they will rub alot....a BL will take care of that to some degree....there are a couple threads on the go right now with tons of pics of lift/tire combos, you just have to search/look for them
example: http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=73;t=001196