Hi from SC - another Steyr lover here, got 8 of'em. As you're probably aware, the M and M-A1 are different in two respects. The A1 models have a longer barrel and a rail which may make it harder to conceal. The A1 grip is slightly larger and more squared off than the M, too. You've already found out the conversion is mucho bucko. To me, it would be better to sell your 40 and buy a 9 outright. You might check Tier One Guns http://www.tieroneguns.com/index.html in Monroe, NC, they were stocking the new series Steyrs.