I bought a new G3 a few weeks ago but it cost more than $15000. They actually have a 3.99% interest rate going until the end of March. As for aluminum vs fiberglass, you need to decide what you want to do with the boat first. If I didn't pig hunt the delta or gig flounder I would have gotten a traditional bay boat. I also wanted a center console.
Well the last boat i had was a 21' triton bass boat, it handled good in rough water and was fast..ive never had a aluminum boat so i dont know how they would compare, im not so much worried about the speed as i am just having a solid boat that wont beat you to death, as far as my plans for the boat mainly bass fishing, running the river, catfishing etc, maybe one day get back into fishing tournaments