I used (as a professional - 150 gigs/ year) a Music Man Stingray 5 for 5 years. It was one made in 1993, very good specimen.
At that time I thought it was the best bass (for me) ever built and that I'll never change it.
It had a very tight low B - very important for me. Other Stingrays I tried were floppy, so as an advice, if you buy one always try it first, because you'll never know what you get. In the specs, they say "selected hardwoods" for body, but you don't really know what you get when you buy a solid finish MM. Mine was poplar, not ash for example.
Anyway, huge sound! well ballanced, and very comfortable for me to play.
At one time, a friend of mine had a Yamaha TRB 5 to sell, I paid 500 EUR for it, as a backup bass. I bought it because it was really nice and fun to play, to have it home.
I had once a rainy day gig, and I decided to bring my cheap Yamaha to the gig. I was lacking the big sound, I thought it was not OK, but then again I was very impressed by it's incredible sustain. My sound engineer came to me after the show and he told me I should take this bass from now on.
Two things happened at that time. I Understood that there are better basses for me than my beloved Music Man (which btw it is for sale on the Warwick.de forum). So I just started to buy basses (lots of them) from ebay, different brands. It was about one full year of testing. Another (good) thing that happened, is that I started to realise that the basses with the best sound in the mix, were the basses with the thinnest sound when played alone. So in this time, I made a good ear for good mids that made the bass to cut through. Because it is very hard to predict how a bass will really sound in a mix.
Anyway, during this time, 2 brands caught my attention more than others: Yamaha and Warwick. In the end I 've chosen Warwick, for more personality in sound, and for a tougher feel. I liked the MM very much for being very tough, good for tours. I had the same feeling with Warwick, while Yamaha felt a little bit fragile to me ( I know they are very tough instruments too, but it was simply my feeling)
One of the first Warwicks I owned was the Thumb NT. It is an amazing instrument. You can finally see where are the extra 1500 USD ;-) Definetly. Different world of sound quality IMHO. It actually has something of a SR5, that lower positioning in mix, but far more articulated, and more present in the mix.
Warwick has many many models, so if you chose a Warwick take your time and try some. A good thing is that if you try a thumb NT and you like it, you can simply order a new one and it will sound the same. Warwick are very consistent from bass to bass, I cannot tell you the same thing about Music Man unfortunately.
Don't buy a thumb NT or BO without trying first, because it is different positioned on your body than a standard bass, and you might not feel comfortable with it. Many guys including me, experience neck dive. They are also very heavy. But the sound is unique and incredible in the mix.
Well, I am sorry for the long story, and I hope it helps you making a decision.
Some of my conclusions are:
Music Man SR 5:
pros:
Good balance, nice to play, nice feeling, looking good, very reliable
cons:
you never know what you get, si try it first, really hard to get a tight, focused, articulated sound.
Thumb NT:
Pros:
different league of sound (IMHO), tighter, and more articulated sound, tough and reliable as well. You can place it in the mix anywhere you like.
Cons: very heavy, and not very comfortable to play.