Personally I'd lean towards the proven record of the SIG. The Taurus may be a good gun, but the SIG is a great gun and has been around a long time. Plus look a the current crop of new pistols. The last few totally new pistols have taken a couple years to get "right." S&W M&Ps, Ruger SR9s,LCPs and Springfield XDs have had a slew of problems for the first couple of revisions. Sure, anything mechanical could have problems but I've beat the living hell out of a P228/M11 and it still put everything on target. Plus it's a commemorative so you'll only get one chance to get it.
Stay safe, keep your head down