do yourself a big favor and go with an AMS reel. You will not regret it. If you use a closed face reel, its not a matter of if, but when you will forget to push the cast button. One of two things is likely to happen if you shoot without pressing the release. Either the line will snap and you just lost a $15 arrow, or the arrow will return on the same path it left....making itself a great threat to your eyesight. I have personally seen both happen multiple times. I have NEVER had either happen with my AMS. AMS will also give you more effective range because you will have less line drag. Only draw back is not having any reeling torque, but you said you already have a big fish rig. I hand figh mine anyways, and just reel up the slack.
Can you tell im an AMS fan
kyle