I have 6 and it probably too many, but I like the choice. I don't think I have any that are too overlapping in sound (except perhaps the Variax) so I feel justified in their existance. A quick summary for those who care:
[b]Lakland 55-60[/b] - An amazing classic sounding Jazz but 35" scale 5 string.
[b]Spector Q6[/b] - Very focused and clear sound from the EMGs, really cuts through a mix.
[b]Fender Precision[/b] - Fitted with flats for old school thump, my general 'pick up and learn a new song bass.
[b]Peavey T-40[/b] - Heavy but cranked with a pick not much can beat it. Many sounds and still surprises me.
[b]Line 6 Variax [/b]- The ultimate chameleon bass. The normal models aren't all convincing but there is nothing more versatile, the acoustic and 8/12 strings are a particular bonus.
[b]Yamaha RBX775 - [/b]Defretted a few years ago and fitted with flats, I can get an amazing upright tone from it.
I do fancy a Stingray still even though the T-40 can do the sound with some EQing, I think it's the look I miss.