I also recommend upgrading when you feel like it. I bought one bass and almost never touched it. Then I bought Rocksmith, and now I have two more basses and I never play them outside Rocksmith. Each one has enhanced the playing experience in their own way. My second bass has 24 frets as opposed to my first one's 22, so I had to readjust my playing posture in order to reach the frets further away. However, it was built in unsatisfactory quality and I was never arsed to get it fixed. The third bass is somewhat similar to my second bass, but it's built just about right, is better balanced and looks cool(er). Sound-wise I can't tell much, but playing a better-quality instrument feels very different (note: quality and price don't always go hand in hand).