The Sig P220 is one of the most accurate, out of the box, no fault 45s on the market. Will handle +p ammo without a problem, user friendly controls, easy to conceal for a lg frame handgun and customer service is second to none. You can still find nib 220s for $500 or less with a little shopping around. A recent test had the 220 going 10000 rounds with no loss of accuracy (1.25 I believe) and only three failures due to faulty ammo. You will not be disappointed in this choice. I love my Sigs and I am a 1911 guy also. Then for a compact model check out the P245 this one is a winner also
Edited to add, the best place Ive seen for mags is CDNN, they have "demo" mags which are as next to new as you can get and good prices on their nib mags. Look for factory mags or MacGar (sp?) mags as MacGar (sp?) are the mfg of the factory Sig mags