Jman here is my 2- bits about "approach" shoes. Don't waste your money! It's an advertising scheme to force people to buy more crap. Any shoe that hikes well won't climb well, and any shoe that climbs well won't hike well. The sole needs to be flat to smear which is mostly what you will do on lower angle beginer routes and any rock slabs or scrambles you will encounter on approachs. Most approachs I know of involve mud, wet grass and moss. You need traction to navigate this "trash" and most approach shoes lack it. When starting to climb, you will progress much quicker in a rock shoe than in an approach shoe, which will detract from the experience. Any one that can climb well in an approach shoe already had extensive practice, it requires precise foot work, which most novices lack.
Spend your money on a good pair of rock shoes that fit well! ( Don't let some sales "elf" talk you into something too small, it will not help!!!) Just carry your rock shoes in a daypack with all your other essentials. Continue to do your approachs in your hiking boots, or better yet try a high quality pair of running shoes or trail runners. They fit better, offer more cushion on hurting feet and knees, and have better traction than most approach shoes. (I also find they climb just about as well!) They also tend to be lighter take up less space, and are as equally non effective at keeping out water as approach shoes. Oh yeah, and cheaper!
Approach shoes are just like fancy, stretchy, flashy climbing clothing, they don't make any thing easier they just make you look better.
Good Luck!
ron
* As Dru noted, Tevas also work although I disagree about the smell. Some of the funkiest feet I've smelled were in Tevas.( Not my own of course!) Something about the materials they use holds some serious funk!