I own 8 Wilson Combat 10rds mags. I've used them in my Springfield and S&W for IPSC. The only problems were due to the mag-holders ... not allowing a smooth draw the top round would get kitty-wompus and, without correction (during a speed-load) would jam the slide.
Two things:
1. Get Safariland 773 mag-holders (come with rollers to prevent aforementioned problem and with adjustable cant afford excellent draw) Oh ya, you're a cop ... you probably don't have room for those ... get the regular Safariland leather duals then ... no worse off than with 8rds 'ers at that point anyhow
2. Reloads are MUCH nicer with the longer sticks ... particularly with a mag-well ... which wouldn't be a bad idea and, if you get the blue one (again from Wilson) it will probably go unnoticed by the "normals"
Otherwise, order an SV or STI ... as a cop, you can buy the hi-caps (w/Dawson +1's, you can get 20rds in a .40sw without sticking out much below the mag-well).