Your forgetting a 3rd option. Buy a redwolf custom TM G17 that has the PGC metal slide and 150% recoil springs pre-installed.
http://www.redwolfairsoft.com/redwol...al_Version.htm
I had mine brought in by Imperial -
http://www.imperialairsoft.com/.
If you do get a TM Glock, I highly recommend buying WE mags and installing a guarder mag catch.