A 2" lift is pretty common for 31's as most lifts more than 2" make the 31's look dinky. Plus you can then stay with your stock shocks and stock swaybar links, keeping the cost down.
Many will go with a 2" Spacer lift (aka Budget Boost "BB") for about $100. A better option would be to installl 2" BDS springs which is very popular choice.
When I had 31x10.5's with a 2" BB, this is what it looked like.