I don't understand why you can't buy a Glock. My G30 only holds 10 rounds in the mag, so what would be the problem?
No Springfields here in Massachusetts. I know you said you don't like the .40s&w but the m&p 9c and 40c both hold 10+1 in a package not to different from what you have now. Personally though I would just stick with what you have and just carry two backup mags. And I bet someone will be making mag extensions for the shield soon.Springfield XD 45 sub compact. It's short mag holds exactly 10. Great gun. I carry it.