The money you save on the 'good deal' 33" tires, you will spend more than that on the gas your truck will drink, over the life of the 33" tires. Then you could add extra money on that for the wear and tear on the clutch, driveline, brakes wheel bearings etc.
I have a reg cab 2009 4 banger and I really can't imagine running 33's on a 4 banger without regearing. I was debating between 33's and 32's and so glad I didn't get 33's.
On the other hand I have not actually ran 33's just 32's so who knows maybe the extra 1" diameter and extra weight isn't such a big deal. Pep Boys has a good looking MT in 16x33" they usually have for buy 3 get one free. Ends up being like $550 installed after the mail in rebate. That's half what I paid for my 32" kumho's installed, tax, balance blah blah. Even though my Kumhos cost twice as much, in the end I feel a little better knowing I'm not tearing my truck up as much and I can still use 5th gear on the freeway without having to ge-gear.
Now if I ever decide to do a 6" lift, some of what I just said goes out the window