4X10 is perfect. If You plan to play shows regularly, it's more convenient - IMHO - to have separate two cabs than a huge with more than four elements. Cabs with neodymium magnets cost a bit more but they don't weight and with four elements Your back will thank You. ALSO, it has to have two handles, unlike some huge 15" Peaveys I've had. Unless You ca afford a stage hand. Or the guys in the band lift weights and enjoy carrying around Your cabs
If the amp has a good low end, You might want a 15" element cab, too, or 18" for clarity (or BOTH, if You're mad and like to carry heavy cabs :P ). Especially if You're using a 5 string bass or tune below E. A mad fuzz lover will probably however get away with a 15".
Besides my Hughes & Kettner Quantum 600 stack I've regularly used Peavey 5015, Laney Klipp 100, and Marshall JCM900 for bass amp, too. Only the Laney Klipp has that seriously massive low end but then again there's nearly always been mor than one bass player in my bands and I'm more known as that guy with ear piercing highs
For a first bass... perhaps a prescision or a jazz? Especially if You plan to gig around and if You play clean, since those are the basses the sound guys are ALWAYS familiar with. Many basses have J & P pup combination that can be a nice way to have both. And with distortion there's a considerable difference between them. Also, if the bass has active preamp, it's nice to have a switch to turn it off because not all pedals handle them and I'm sure You'll be stomping on them. Unless the preamp is really cool. (like MusicMan preamp that I just love - but as said, I'm a treble guy)
When trying the instrument out, You can tell a lot about the sustain by the weight of the instrument and how it sounds unplugged - even more than with guitars I think. A wide strap and a good playing posture helps if it weights more than 9lbs.
Oh, and J bass has a really tight string spacing but some guys who started as guitarists say it's more appraoachable.
D.o.S. wrote:
Also jesus fucking christ change that avatar I almost had epilepsy typing this response.
SO SOOOOORRRRYYYYYYYYYY