I would go with MMS as you already got ECUteck
But if you had no tune I would go with ASG for Verso.

PW tmic really debatable but I would go with STI tmic if you can find one 2nd hand and should be a direct fit.

going to assumed that the injectors are decaps with ASG? I dont think MMS do that hence no pricing, but if you can find some STI pink (516cc?) injectors that would be more than enough for your application.

You can DIY most of the stuff especially the top mount probably the easiest one