^ Woah- a bit of overkill. And you don't lose power due to having to spin bigger tires- yes, this is SOMEWHAT true, but the REAL reason is:
Tires are gears!
Yep. In the power equation, the diameter of your tires helps determine what is known as the final drive ratio. Bigger tires lower than, reducing torque multiplication to the ground, causing the vehicle to feel, and be, slower to accelerate, same as if you re-geared from 3.73 to 3.21, for instance. The bigger the tire size increase, the lower the final drive gets. This is why you re-gear a vehicle for bigger tires.
As for re-gearing, if you have OEM 3.21 gears, try adding a Superchips programmer to re-gain some of your power, and also to adjust the speedo/odometer back to being accurate. I would recommend re-gearing as a last resort, as the 3.21's can handle 33's (it'll never be a rocket off the line, however, and you may lose ~1 MPG). Re-gearing will void your warranty with MOST dealerships for your entire axle at each end, and costs a LOT to do- it's up to you to determine if it's worth the $1K+ it'll run you, parts and labor.
If you REALLY want to re-gear, you can find a set of OEM 4.10 gears for not a ton of coin- NOT Rubicon gears, but '07/8 D30/D44 gears (I'm assuming you're not in a Rubi, by the way). They're uncommonish, but out there. Check Craigslist, and the forums.