Stick shift racers?

I couldn't tell you how much more a stick is than an auto since I've never bought an auto. A jerico DR4-4 is about $4500 (w/shifter and slip yoke). Slipper clutch would be about $1200. Flywheel (steel about 300, aluminum about 450). I'd stay w/steel since there is less maintenance. Bell housing about $600 these days.
The jerico maintenance is pretty light. Change the oil a few times a year (about 1 to 1.5 quarts) because you get some metal in the oil. I get about 400 passes out of a set of dog rings (150). Other than that the clutch disk will likely last 100 to 200 passes depending on your power and setup. Its a lot of work until you get it dialed in, and then its nothing but fun.
I can't tell you about liberty or gforce from personal experience. I can only suggest that if you're going to race then the jerico shifts fast and reliably.
[ame="https://www.youtube.com/watch?v=T4jDLKwd9Gs"]1st Round ECNSSA - YouTube[/ame]
Vid is barracuda/jerico

Good luck