Meh, as of late I'm of the opinion that some forms of music are just better without a bass player. It depends on what you're trying to create. If it's a chugga chugga riff type band then you probably should get a bassist for that low frequency. But then again, look at AJFA.
For my band personally, we're much better without a bassist. We can get the lower frequencies we need from Reason's effects and add so much more to them, all without the drama of having a bassist.
In my experience with bassists, they've just been detrimental to the band. The small contributions they've made to the bands I've been in were completely overshadowed by their inability to overcome their inferiority complex, causing lots of inner strife within the band. Unless they're the DiGiorgio/Claypool/Chancellor type, bassists should just keep their mouths shut, do their jobs, and get paid. You wanna write a song? Then write a song, but write all the parts, not some goofy bassline and tell us to write the rest around that. Also, they have this uncanny ability to tell you that they don't like what you're playing, but have no idea how to make it better. Know your role and STFU.
The only things worse than the inferiority complexes of bassists are the inferiority complexes mixed with the gargantuan egos of keyboardists. The frontman ego pales in comparison to that of a keyboardist.