I have used the Sigmas for loaners and trainers for over 20 years and found them to be reliable and sturdy in stock form. I tried every non-destructive modification and aftermarket product for them, and it is with considerable knowledge and experience that I recommend you choose another gun to trick out, and don't waste your money on an SW40VE, or any other "SW". The SD has a vastly improved trigger, and a few useful accessories.
If you can afford to start with a used M&P pistol, the sky is the limit on mods and gadgets, including many internal improvements.