Personally between the 2 I'd go SA. But don't count out SIG. The SAs that caught my eye was the TRP and RO, but the prices were heavy though. Then I looked at SIG and their 1911 Nitron had most of the features I liked in the TRP without the heavy duty price. SIG has about 2 dozen different 1911 models to choose from. Their fit and finish are excellent, lifetime warranty and very good CS. serious contender IMO. Check their 1911s out.
SIG 1911 .45 ACP
SIG P229R E2 SRT 9mm
Beretta BU9 Nano 9mm
Beretta 84FS .380 ACP
PWS (Primary Weapons Systems) MK114 5.56 NATO