Personally, I would avoid a high-rib anything ... they seem more suited to Trap (ATA-type) shooting than anything else. 32" barrels seem to be the most poular trend for Sporting & FITASC these days, however I wonder if 30" isn't the more effective "all-round" chioce. Not everyone can adequately handle even a well-balanced 32".
Gun fit ( and that doesn't mean "Gee, she really comes up nice ! " ) and balance are critical. You should be able to centre your shot charge with a 50/50 or at most 60/40 (above/below POA) pattern, and the balnce point should be roughly through the hinge pin ... or about 2" off the breech face.
Any further back, the gun will be lively, but not smooth. Any further forward, it will have a smooth swing, but will otherwise feel like a pig on a pitchfork.
The Beretta 686E, Browning 525/625 or XS Special Low rib Sporters or Caesar
Guerini Sporter or Limited Sporters would all seem to fit your budget limits, as would a good used Beretta 682 Gold or Gold E Sporter.
After a bit of good coaching and mentoring and maybe 5000 rounds, you should be able to develop a pretty good idea of what's required for fit and balance adjustments ... and develop a good mounting technique in the interim.
Enjoy
