I've got the Line 6 POD X3 (bean) and I've been very pleased with it. It has amp, cab, mic, and stompbox modelling, as well as a USB recording interface (24-bit, 96 KHz). As I've never owned even a tiny fraction of the devices the X3 emulates, I can't attest to the accuracy of the models but I will say that a good percentage of the tones are highly usable and more than a few of them border on the excellent.
One aspect of the X3 I really enjoy is dual tone. With dual tone, you can have two completely independent audio chains (i.e., two sets of amps, cabs, stomboxes, mics, etc.) and mix them together freely. With 8 channels of audio coming over USB, you can record any combination of the two stacks, in stereo, plus the original dry signals.
My two basses (Exploiter and Precision) both record equally well/easily with the POD.
One caveat: The X3 Live models have suffered from an audio dropout problem that renders them of dubious value for recording. The bean and rack-mount models, curiously, do not seem to suffer from this defect.
(Message edited by honninscrave on January 19, 2010)