Few things - $$$$$ does not equate to a great bass. I could sell you a abass for 100k if you wanted but do you need it? Heck no.... first off, your "humble" bass is a good solid bass. Secondly, what will you use the bass for... My advise, if you want a good vintage bass - check out my columns in Premier Guitar. I did 2 different series.. See the year end review and find the best bets. I also did a great basses under 2000.00.... That should help. You need to figure out, what you need vs what you want. W/a 5k budget, you can get lotsa stuff, do you need 5k bass? I'd buy 2 or 3 lower price basses, fall in love with one and trade the other bass for a 2nd version of what you love...
Drop the gig bag, bring the canolis.