I have an M40, and I'm currently shopping for a USP.
This has come up before in another post; with me, the deal is that I just didn't realise how much I wanted a SA/DA option, a decocker, adj. sights and all the accessories that went along with an established weapon like the HK. Also, my particular M40 (59xx) tends to shoot low and left, which just annoys me.
OTOH, it is an extremely well made piece (the barrel, btw, is way lower than the HK's, or your Glocks, for that matter) and I've never had any trouble concealing it SOB or in a G&G paddle holster or even in the pocket of my khakis. Seriously. I mean, it prints a little in the pocket, but if it's just for short little chores out of the house, it beats putting on an untucked shirt or light jacket in summer weather.
[This message has been edited by traitorjack (edited July 27, 2000).]