I have an itch for a .22 pistol. I already have a .22 revolver. I have several M&P pistols and know the .22 Compact gets pretty good reviews. But I also know the Mark IV is a quality pistol and I believe more of an accurate piece. A local shop near me has a used .22 Compact for $250. So other than making noise, which is the better quality piece? Is an extra $150 for the Mark IV worth it?