Well, it looks like budget is not going to be a problem for you. As explained by xt master, a "budget boost" is an entry level suspension lift consisting of coil spring spacers and extended length shock absorbers, in the $200-$400 neighborhood. However, I think you'll be happier in the long run with the next option...
For a bit more money the next step to this is the addition of taller coil springs instead of the spacers. Ideally you want a progressive rate spring in the rear that will compensate for Varying load rates and consistently provide a smoother ride. I don't what to make a specific Brand recommendation because I don't have personal experience with these kits but for a good idea take a look at something like the Rough Country 2.5" Suspension for $299.00...
4x4ROCKSHOP.com - (877) 4x4-ROCK
Add an adjustable trackbar($220), a good steering stabilizer ($50) and a 1" body lift ($150) (
http://www.4x4rockshop.com/scripts/prodList.asp?idCategory=107) and you'll easily clear 33" tires. For the kind of driving it sounds like you plan on doing I'd go with a good "AT" (All Terrain) tread that will perform well both on and off road, yet be relatively quiet on the road and get good mileage (Tire & Wheel pkg. mounted and balanced = $1600).
So, you could do a real nice lift for right around $2,320 +tax, license & gift wrapping.
Shop around. Deals are there if you look for 'em. Check out our vendors here at Jeepz.com.
One other thing to keep in mind is the effect taller tires will have on your overall gearing. You didn't mention what gear ratio you have in your axles but the following chart will give you an idea of where your engine rpm will be with new tires.
YELLOW = Highway Driving, Good Fuel Economy
GREEN = Daily Driver, Best Overall Performance
BLUE = Most Power and Towing, Reduced Fuel Economy
As you engine rpm drops you generally can cruise easier at freeway speeds but the trade off is no low end towing or take-off power. And if your lugging your Jeep just to get it up to speed, this will have a negative impact on mileage; it's got to work to hard just to get up to speed.
The other end of the scale is running to high rpm's. Sure, you can pull a tank and burn rubber all day long but maintaining freeway speed with the engine screamin' like a banshee will kill you mpg and could shorten engine life as well.
