For many years, my single "forever" bass would have been my 2003 Am. Series Jazz with Lindy Fralin Split-Jazz pickups. But I'm afraid that's changed. If I could only have one, it would have to be a five, which means it would be my G&L USA M-2500. I might prefer a lightweight empress body, and perhaps an L-2500 instead of the M, but the M has been phenomenal and I love it.