it totally depends on where exactly you live, and what your limits of liability are. I, too, am 23 with a perfect record, but full coverage for my 2002 corolla is something like $700/6mo. I live in Austin. If you live in the middle of nowhere, it can be a lot less expensive. I think my limits are something like 50-100-50. I am also married and get a "good student discount", which helped but not as much as I would have liked.
When I looked into getting an MSP in place of my wife's SUV, it came out to around $80 more/6 months. It will be more, but i'm not sure how much, for a male driver. I would estimate you'd be paying maybe $130/mo or so, but that's just a guess.
Call state farm and ask them for a quote. that's what i did when I was interested in a new car.