I'm not a fan of selling one gun in favor of purchasing another. Especially if the one you'd be selling is reliable, which I'm assuming it is.
I got my Allround used. One of the previous owners swapped the original sear and safety lever for SRT equivalents. I'm not a fan of Sig's SRT. My point is that I can't really tell you what a stock Allround trigger pull is like. My guess is that it's probably very similar to every other DA/SA Sig fresh from the factory. A friend of mine shot a box stock P226 into IDPA Master. The idea that for a Sig to be competitive it has to Grayguns is false. I'm a big fan of GGI, but their work is not absolutely necessary. In my experience, dry fire and live fire does wonders for the trigger system. A trip to GGI can be done later on down the road when you have money available for their work.