Might I suggest a Viper Mk IV?
If you're starting out on combat you'll probably die a few times. My Viper is mostly parked these day but I sometimes take it out for a spin to a Hi-RES or Haz-RES or CZ. Mine is worth 10m (A-grade, plus Eng), so the insurance cost if I lose it isn't that great. With your 170m it's easily affordable. Mines got 2x C1 Beam Lasers and 2x C2 Multi-Cannon, and a bunch of other bells & whistles. Somewhat engineered (more to do) but top speed 332 (boost 420), FSD jump range 27Ly, shields 322, armour 825, 8T cargo space.
It's small and nimble enough that it doesn't become an insta-target in a CZ the way a bigger ship will.
Or, as others say, the FDL. I also found the Cobra Mk III and the Asp-X (when rigged for combat) to be very acceptable. I never got to grips with the Vulture and sold it a long time ago (felt too 'fragile' for me, and not enough 'pop' on offense). My fully kitted FDL is worth 107m. My Python (general all-rounder, excellent ship incl combat) is worth 183m (A-grade) but that would clear out your bank balance.