MP5's full auto are a real treat. but the Thompson is pure sugar! I absolutly LOVE the thompson, but if you are going out out to rent and shoot you should go with the MP5 because you will waste your money buying expensive .45 rounds as apposed to cheap 9mm.
also if your down there you should rent an UZI! they are hands the best sub machine gun, at least to me
you can unload a whole magazine and still stay on target. plus I beleive at the start of march is the big UZITALK (
www.uzitalk.com) shootout so there will be TONS of nice full auto weapons there. My work should be down there showing off some of our uzi's (
www.vectorarms.com)