Cab IMO a 3x9 is the MINIMUM I would put on any short mag. Any less is hamstringing a flatshooting mag! Whats an extra $20? Thats not even a box of ammo. Personally I would recommend an additional $20-$25 above even than and get a VX I 4x12 gloss!
What is $20-$50 on something you are going to get a lifetimes use from?
RA