-- Last Updated: Jul-29-12 8:41 AM EST --
Yau can and are way over-thinking this decision. If you want the best either get out the credit card and get an OK Ultra 4.7 or go all the way and get a Hobie Pro Angler.
But if you come back donw to earth, look around, you'll be fishing next to peopla with all kinds of kayaks catching more or the same fish you are.
Depending on your size you can get away with a 12' kayak, but if approaching 185# go for 13' or bogger.
There is a Perception 12' kayak sold at Dicks called the Perception Sports Caster, and also sold at West Marine called the Pompano, outfitted a bit different seat anchor trolley or not sold for just inder $500. This kayak is the 2009 Tarpon 120 rebadged and sold at mas merchandised pricing. (Great deal for entry 12' kayak)
Rudders are (MPO) and I do have 1 kayak with and 1 without.. the one without gets more use, are a luxury.. very useful in 3 situations:
1) Drifting a flat or shoreline in a light breeze and current to help keep the nose of the kayak pointed in a specific direction
2) Peddle kayaks
3) In a stiff cross wind
13/15 Prowler is a great platform as is Tarpon 120/140 and Redfish 12/14.
Rethink the Tempo style hull.. if you do not lik it because you look at it as a racing hull.. it is a copy, hull side, of the OK ScupperPro which is considered one of the better kayak fishing platforms designed. The deck is a bit different and the Tankwell area is sort of useless to fisherman. I have a ScupperPro and a Kazkazi Dorado and if I'm going fishing the ScupperPro is my choice 90% of the time with no rudder. If I plan to cover 10 or 12 miles I'll use the Dorado but it is less comfortable, hard fiberglass hull it does paddle with much less effort and has a rudder which I seldom deploy.
If you want to look at , try and buy, rent for a day.. chack out Florida Bay Outfitters in Key Largo.. July 28th & 29th thye ar having their annual end of year sale of used and rental fleet of kayaks. http://kayakfloridakeys.com/Sales/salerentalgear.htm