GS500 is about the same bike it was 10 years ago. Great for a starter but I would not lock a loan on one if I were you. You will want more than the bike can give within a few months and you will be upside down on the loan for a couple years.
If you are gonna finance, you might as well get a 600 sportbike, you will not out grown it for a long while if ever and you will not feel like you were ripped in a few months while making the payments.
I personally would save money and buy a cheap bike. for under $2k you can get a pretty nice gs500 or old sport bike and it won't be too bad if you wreck it or need to upgrade