I agree that you should stick with 17 inch wheels. You'll be glad you did in the long run. If you're planning to do a lift kit (even just spacers) do it at the same time. Here's the caveat: Plan for what you think you might be driving through and your personality. I know, I know....what does that mean?
I have only had mine for a short time and set it up for the type of driving I saw myself doing. Washes, deserts, hills. However, my personality is one of testosterone and my first real trail was over lots of rocks and damaged one of my nice pretty wheels. If I could go back in time, I'd ditch the pretty wheels for some nice steel bead locks. Hell, I could have gotten recentered H1 wheels for the same cost. I'd also ditch the 33 inch (well, 285/70) tires and go with 35s for more clearance. But even with 33's, on a 17 you'll still have plenty of tire to air down and at least decent clearance.
So be realistic in what you'll be doing....not just humble. Then start planning, purchasing and building. Seriously consider doing the lift and tires/rims at the same time, though. Oh, and not everything requires a big budget. Check out the threads regarding free or low-cost mods like fender modifications and such. LOVE the look of my stock fenders now.
Always follow a great leader. In the absence of a great leader, BE ONE.