I believe the Sig P-6/225 is one of the baseline best Sigs ever made and has been wildly undervalued, largely because of the flood of German police guns. I carried one for years and still occasionally carry/shoot it (as recently as last week when I was using my P-6 in some instructional stuff). I know a bunch of cops who carry Sigs using the P-6 for off-duty concealed carry. Even Bill Murphy, who bleeds Glock polymer, conceded the P-6 was a great little gun (he bought one for his daughter). I begged CT to make LaserGrips for it, to no avail (since it's an out-of-production gun).
The P239 was the designated gun to fill the 225 niche, but I don't think it ever really succeeded in doing that...the $840 MRSP ($915 with night sights) on the 239 surely didn't help! I thought the P250 Compact might well step into that notch, and I liked the prototypes I shot. In the end, though, that long DAO trigger pull, long reset (and $750 MSRP) put the 250 into the HK P-7 category...a gun you need to shoot exclusively to shoot it well...
Michael B