Depends on how much you are willing to spend.
If money is no issue, I'd no doubt get a
Serek bass.
Absolutely killer basses, that looks amazing too.
Here's a link to their home page:
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And here's a demo of their Sacramento model, though the specific bass used in the video is 32" medium scale, but it comes in 30" short scale version as well, and you can get different pickups installed from stick if you should wish that too:
For a bit less you can get the new
Music Man Short Scale Sting Ray:
In the middle kind of price class there is something like the
Fender Mustang, either as P/J bass, or a bit more expensive the version with an original Mustang split mini P type pickup.
In the budget end
Squier Jaguar,
Gretsch Junior Jet and
Ibanez short scale Talman basses are all great value for the money.
Also in the cheap budget end is the fabulous
Ibanez Mikro bass, which has a scale length of just 28,6", compared to the regular 30" short scale length.
I personally love these small cheap basses, that are extraordinary well build for the little money you pay.
And they don't look bad either, here's the Mikro GSRM20B version, the B models comes with black hardware and either in walnut or weathered black finish (here in the weathered black finish):
The
Danelectro Longhorn bass is absolutely worth checking out as well, even if it is a bit special.
Personally I love how it looks and plays.
It's in the more expensive budget or lower middle kind of price class, is semi hollow, has 24 super easily accessible frets, and has a more narrow string spacing than usual, think 16 or 17 mm, as far as my memory serves me:
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My Jerry Jones Longhorn, which is a higher end clone of the Danelectro ones (now out of production and hard to come by used) actually sounded absolutely amazing through my Ampeg B15S, running the 2 lipstick pickups of the bass in series.
A stock option on the pickup selector of the Jerry Jones but not on the Danelectro, so in case you would like to do the same it will require some rewiring, even if that won't exactly be a big or difficult procedure as long as you got a soldering iron and is fairly capable of using it.