Hi Hood4r, a fellow Ozzie Here.www.umart.com.auwww.msy.com.auwww.pccasegear.com.au
a few to start you off.
take a look at umart as they have some prebuilt enty level gaming computers avaliable.
Note 30-50 fps is not really considered a good frame rate. you want to aim for around 60fps to remove the stutter from game play.