For that price, you should be able to pick one up that is extra special as in custom maker with damascus and mammoth ivory, stag, or something that will become a family heirloom of sorts. Id lean that direction if money wasnt that big an issue and the brother would appreciate it.
I bought a Bill Sowell Damascus hunter with blue mammoth ivory handle slabs on this site a while back (ad copied below). It is a really nice knife.
"I have a Bill Sowell Damascus hunter with a stabilized blue mammoth handle for sale. I paid $430 for it and will sell for $275, it is in mint condition and comes with an ostrich pouch type sheath. Also, has a damascus guard. Sorry I don't have a camera. Only reason I'm selling is that I really need the cash. Thanks!"
I also bought a really neat little damascus hunter a while back off the forums. It was made by Mark Nevling of Burr Oak Knives.
You didnt mention talonite as a possible material, but I have three hunters in talonite (two Camillus talons) and a Rob Simonich custom that I like too.
You could probably have a custom maker do one for you or find one for sale.
Also, there is a lot of info and suggestions on here about damascus and etc. if you do a search. Hope this helps.