Nice selection there. Of the three, IMHO; the Colt pockelite would be my choice. I wouldn't own that LCP - with it's atrocious trigger. No opinion on the new Glock though I'm glad you like it. The Colt, with it's exposed hammer provides a second strike capability and can be carried 'cocked and locked' - which I am a fan of. If I could only have one .380 it would be the Beretta 85 single stack because it's like your Colt but....better.
I saw a 42 at the LGS last weekend and everybody was oohing and ahing over it.
I find it interesting that both S&W and Glock released a new single stack .380 at about the same time. I think the S&W is significantly less expensive: $379 vs. $500+. Oh, and its a S&W.
Product: Model M&P BODYGUARDŽ 380
Glock 42 | G42 | 380 Pistol | GLOCK USA