There are as many different approaches to the bowie as there are fighting styles, and there are a lot of different people out there making great ones.
Right at the top of my list would be Jerry Hossom, and I don't even own one of his bowies yet. I put him at the top of my list because he made me a 20" short sword that handles like a 12" bowie! He works in CPM 3V, and his prices are not extravagant, in the $500 range I believe.
I have four Black Cloud Knives fourth generation Fighting Bowies. They are awesome combinations of both balance and blade mass for a blade that points, and hacks, and backcuts with equal gusto. Unfortunately, I don't know if they are available any more except on the secondary market.
The Mad Dog Panther is an awesome knife too with amazing heft and balance, but expensive at around $900.
I have a Matt Lamey Sunrise Fighter bowie that I love. Workmanship is excellent, balance is excellent, quickness is excellent. The only thing I have not verified about the performance of this knife is edge performance, but it is very fine, may wind up being my favorite, and Matt only charges around $400 for one.
Jerry Hossom and others recommend Rob Patton very highly as well as Bruce Evens.
I think a bowie from any of the above with the exception of the Mad Dog or the Black Cloud could be had for under $500.
Then there are the masters, Fisk, Bagwell, Cafrey...
Who else? I am not that familiar with the forgers.