Jason,
I guess you know that you don't actually have to spend any money to see what sims are all about? There are two free ones you could try to see if you like the idea before parting with any money for RF-G2
FMS:
http://n.ethz.ch/student/mmoeller/fms/index_e.html
Pre-Flight:
http://www.preflightsim.com/
Cliff