There are many basses I've lusted after over the years. Luckily I'm at a point where there are very few I actually want any more - my current harem keep me pretty happy. I'd have to say if I had to choose it'd be a nice vintage P would fit with my current tastes. Would have to be sunburst, rosewood, tort, well used. A player, not a museum piece. '64 ish I would think.
Being relatively bass-GAS free leaves plenty of room for amp-GAS. I' having trouble resisting the new offerings from orange - a bass terror and one of those isobaric 2x12 cabs would be nice!