TXN, since you're an experienced archer used to finger shooting i'd say you'd better continue this way. The shorter A2A bows (like the Firecat and the Firehawk) are best to shoot with a release - they are not comfortable for fingershooting and are much more accurate with a release. The Warthog can be shoot with fingers but still i guess the release is the better option. The new 2010 Shadowcat or the Scepter are the best choice for fingershooters, so if you can afford them i think they'll be best for you. I have a 42" compound bow which i shoot with fingers only and a 2008 MOAB which i used to shoot this way, but since i've bought a release i am more accurate, which makes me happy , but still i prefer finger shooting and am really disappointed that i can't have the Shadowcat.
2008 Martin MOAB - 45-60#, set at about 51-53# / 55#" Perfect Line" compound/ 55# Mongol horsebow/ 45# "Perfect Line" takedown recurve/ 45# Bearpaw Grizzly hunter recurve/ 55# Samick Longbow Cheetah ... and several homemade bows