Those with Alcoa Wheels -- What Size Tire?

OK, well I finally ordered the 20" Alcoa Wheels from TRD Sparks! I was told that the offset is +50 on these. I was hoping for something a little closer to +35 or so to move the wheels out a little more. But, in any case, I want to find a good E-rated all-season tire around 33"; basically something I can put on without having to do a lift. I am looking at the Michelin LTX A/T2 in a 275/65r20, but those come out to 34.2" I think and probably wouldn't work without getting at least a 2.5" lift in the front. I'm not completely opposed, but I want to carefully choose these tires and preferably not get a 70lb tire either. I also see a few options in the 305/55r20s as well and that comes in right at 33" for most tire brands. My only concern is whether or not the width would fit the wheel wells in the front given that the offset is not much less than stock (I think stock is +60 or +65). Anyhow, anybody with these rims and or a similar offset that has gone to a tire like this, please chime in and let me know what you needed to do, if anything, to get the tires to fit. I'm not pulling a trailer or boat now, but that will probably change soon, so that is why I'm looking to find an E-rated tire; otherwise I would have gone with the 275/60r20s, but that is a regular P-rated one (Michelin LTS A/T2).