thinkin about making a "tactical 22 setup"

i really have a hard time finding anywhere around my house that i can shoot a 308 at (and have it actually be challenging) about the most i normally have access to is probably 300m or so. so...since i do like shooting oh so much...heres what i want.
a setup that weighs in approx. the same as a remington LTR w/scope and all (about 10lbs) has to be accurate.
dont want to spend too much $$ (low budget for this thing)
so far im leaning towards the CZ 452 Silhoulette. aparantly people are having great results with these.
i think they run about 250-300 or so
so...my questions:
1.) which CZ rimfire is the "most accurate"?
2.) how are the synthetic stocks? cheap? decent?
3.) whats the twist rate on each rifle? any of them shoot Aguila SSS 60grs worth anything?
thanks