Sidearms & Scatterguns Looking for info on a pistol

I have 20k through a 9mm STI Maruder without a single issue, I keep it clean and lubed with Slide Glide lite, I also have a SVI full custom on order in 9/40.
1 Mags are expensive, they may or may not need tuning, mine are all gen 1 tubes with Taran Tactical guts each holds 23 rounds
2 IMHO STI pistols are a tad overpriced, but so are Glocks
3 if the pistol is unmodified STI will fix any issue reasonably fast