| Well I think the best piece of advice I can give you regarding the upright vs. electric scenario, is to be yourself on either one of those instruments. Don't let what you think someone else might be thinking, stop you from developing on either instrument.
There are certain gigs and tours you will get on the two instruments, some of which will not cross over. And then there are tours and sessions that require both. All of that means nothing though until you've decided what it is that YOU want.
Someone looking for a bass player for any kind of gig will notice immediately how into what you do you are. I think that your heart being into what you're doing is a far better way to be scene by prospective employers. It may mean that you might not do every gig there is out there because some people really aren't looking for any of the things I've mentioned, they're just looking for someone with an image etc...
But I think you'll be a lot happier by deciding to do what you want, and then showing it to the world of employers out there.
To get employed you really need to be around a scene. If you want to work as a sideman (which I really don't recommend) you have to be in a place where albums are being made, tours are starting and auditions are happening all the time. WIthout that contact with people every day your chances of landing a big gig are pretty slim.
You said you'd done some recording in LA. That's a huge scene for touring. If you have some contacts there I would head out there, get a place to live, try and sort out a visa, and hit up as many people you know there as possible. LA is a quicker place to get into the pop/rock touring scene if that's what you're looking for. No matter what instrument you play. If you're going to do anything in the commercial scene I would recommend having your electric playing very much together, and keeping your upright playing in shape too. The more stuff you are capable of doing, the more hireable you're going to be. If you can run pro tools, do programming, play synth bass etc... you're going to work a whole lot more too as a sideman.
But really I would recommend you do something original. Write songs, have your own band, get your own sound, and ultimately create your own voice on whichever instrument you choose to play. Having your own scene is far easier than breaking into someone elses scene, and it pays of way more in the end.
Easy,
Janek | 
