You are comparing a compact to a subcompact. The G30 is closer to an apples-to-apples comparison to the M&P 45C. The G36 has much more recoil than the M&P 45C. I've shot all three and the Glock kicks like a mule but I love mine and will probably never get rid of it as I shoot it accurately...
On 10-28-10 at Walmart I found the 100 round box of Rem 38 sp +P 125 gr SJHP #L38S2B yesterday for $29.97/bx. This is less than what I've been paying for FMJ target loads. I'm pretty new to this but isn't this a good price? I thought that it would be good to buy these for the indoor range given...