4" lift looking for wheels

I have an 05 Tacoma with a 4" rough country lift and I'm lookin to get some new wheels and tires I've done some looking around and a lot of guys are going 33s on 17s wheels but unsure of what off set to go with saw some one say -12 does this sound right just signed up today with the forum hopefully I'm posting in the correct place any help will be greatly appreciated

 

What do you think of the 4" Rough Country lift? I am looking to do the same with airbags to my 2012 as it will be hauling a teardrop trailer. Any feedback you could offer would be much appreciated. I am looking to put 33" Toyo Open Country Mudterrains on my truck. I am about to do a road trip down to Central America starting this December and am looking to make my truck more overland ready.
Thanks in advance for your help.

 

It's a nice lift rides great but if you are going with the 4" you will need to so some drive shaft spacing