I have been off and on very frustrated with my bass for the last couple years. I play a good amount and practice a good amount. I have studied with great teachers. I have tried 10 different brands/models of strings. I am still frustrated though with how my bass feels and sounds most of the time. Whenever I try someone elses bass, it seems to be easier and more comfortable to play, but most people who try my bass say that they think it feels nice. I have a Kay M1 bass. Any advice? If I am looking to maybe buy a new bass and sell this one, where do I go from here? What is the next step up from the bass that I have?