m&p 40c is a great gun and yes i would go new. i have 2 of them one with crimson trace one without. the model number or sku is very important because s&w makes them with a standard 6.5 trigger but also a mass compliant with a ten pound triggger which were showing up in different states. check there site for correct sku. ruger sr9c and 40c also great but a tad bit heavier. glock 27 imo the best. a tad bit smaller and lighter.