Edit: you may want to check cost of components against cost of the PEP before handing me components, though... R&D weekend could've thrown some of the valuation of things off
Since you don't have the leech, stick with the PGen consoles, but still consider an Exotic Particle Field Exciter... though, the plasma damage is so nice. On that note, it makes sense, when you have the resources, to try to take those sci consoles Epic. The plasma damage boost is significant.
As far as the mods go, I think CrtDx2 Pen is pretty comparable to CrtDx3 and, perhaps (if marginally), preferable in some places. You can read more on it here:
However you cut up these slightly different numbers, I don't think it's worth the expense to go for a x3 instead of a x2/Pen