Ok if you "think" you want to show, I'd look into a show quality kitten rather then just a pet. That way if you do want to show, you will have a quality kitten. If you just buy pet, then you won't be able to show it.
Most of my rex kittens were very much show potential (only had 2 pet quality kittens in 6 litters) - but most were not shown cause the owners didn't want to show. However, they had a quality kitten if they changed their minds.
Breeders are always looking for potential show people cause they cannot keep all their quality cats
Tell the breeders you are looking to show in the alter class. I recommend picking a male for showing as they seem to take to the shows better - he'll be neutered, so it won't matter. But in my experience in showing over 30 yeas, the males like showing a lot more then females.
I'd also pick up a catalog at the show (they should have a few that you can buy) - this has the cattery info on the Bengals. I'm sure Nial would be glad to help you out in picking out a nice cattery to work with. He's more familiar with the breeders/catteries then I am. And be sure to take some cattery business cards if you can - they have the breeders info on them to contact later.
You want to get on their waiting list. The more info you can give them as to what you are looking for (instead of saying - "well anything you have will be fine") - the better chances you have in working with the breeder.
You can give them a few choices, but try not to be too general.
The next Ocicat I will get will be male, and one of three colors - chocolate-silver, cinnamon-silver, or cinnamon. And it will be a show alter too. I don't want any females, any other colors. I will contact breeders who are specializing in those colors with their cats.
Good luck and have fun.
Costs for showing depend on the association, distance to travel, hotel, entry fees. I show in CFA and ACFA - both average about $45-50 per cat to enter. But that includes 6-10 rings. The more rings in a show the higher the entry fee, but its not that much - maybe 2-3 dollars.
This season (May 2007 - April 2008) we will be in 10 shows (CFA/ACFA) - I have 3 more to go to before end of the season. You can show locally or if you cat does well, its worth doing a little traveling for those points and Grand Championship. Start out local and go from there.