Commander size 1911's are OK for carry if you don't mind the weight.
But beyond that, you also might want to think about trading in your SR40 for a SR40c. I have one and always carry it with the smaller mag (9+1)... VERY nice size/weight and power level. You should be able to make that switch for somewhere around $100 to $150.
IF THE SHOE FITS, WEAR IT!... IF THE GUN FITS, SHOOT IT!