Ah - if money is the issue, then your cheapest route would probably be to buy a MTB shoe with a stiffer sole. Then you could use the same pedal system and probably be free of your pain/problems. You could also go with an inexpensive road shoe and try them using your current pedal system as well. That may work for you (or for the time being).

If you have small feet - check out Specialized.com for sale shoes from the previous years models. I buy all my shoes from them because I wear a 38 in the mens shoes and they always seem to have that size left over. I've never paid more than $60 for new shoes (sometimes carbon!). If your foot is larger, this hint probably wont help much.

I have heard that the Tahoe can be an issue for hotspots. My husband had the same problem, if I remember correctly. That's the lace up shoe, correct? I think that because they made it more 'hiking' friendly, they sacraficed some in the stiffness. It may not matter for shorter rides, but the more time on your bike, the more it might bother you.

Whatever you decide - good luck with it. I know how much it sucks to have foot pain on the bike!