"DONT OVER BOW YOUR SELF", ther rite, it's good advise, get one to heavy and it'll wear you out, it makes it easier to develope bad shoot'n habits because your shoot'n muscles will be give out.
As far as buyin, you can spend what you want and then some, I shoot a old bear grizzly ( only 50 pound at 28 in.) thats probably at least 30 years old but it's a blast to shoot ( yuo can find these resonably priced) , later on I'd like to get somthin nice but my grizzly is just fine. When you get set up do some roveing, it's good practice.