This year I went to a Para P14-45ltd ( used ) .
the way I see it is both options are good depending on where you are ( skills wise ) .
Budget plays a big role to me , if you are starting out and have nothing what do you do ?
If you have the budget for all new the S_I platform is definately better than the Para and in the end the difference will be minimal . Plus the S_I will have a much better resale should you choose to sell .
If you have my budget ( nill ) , The step from production to standard was easier by selling my first gun ( lost next to nothing ) to help pay for the next gun . I bought the Para from a very good shooter as a package - to me a proven package for far less than a new set up . All the bell and whistles were done on someone else's nickle . By the way , the guy I bought it from went to a Edge and loves it . Anyway , this gun is still better than I am , But it will be sold in a few years to fund the next gun and it will be a S_I tuned from a gunsmith .
Just my .02 cents