husker
A note on the interfaces. I posted a similar question on the Homerecording BBS, but got VERY confused on the answers. Both the FA-08 and MOX8 have built in audio interfaces. However, everyone seemed to think that buying an external interface (like the Komplete Audio) was better due to Latency. Is this true? I believe I could do basic recording (sounds from the keyboard) as well as Midi through the USB connection of the keyboard. Is latency an issue there? If I connect things that way, I plug the monitors (or headphones) directly into the keyboard. Can I hear the virtual instruments in this configuration?
If I have an AI, I assume I connect both the lineouts and midi out of the keyboard into the Audio interface, as well as the monitors. In this configuration, I assume there is no need for a USB connection to the computer? Also, in this configuration, you set up your DAW to use this interface, and not the Creative Z that I already have?
I can recall the learning process that I went through when I first set up my MIDI studio. The signal routing and such was confusing at first. In the old days you pretty much needed an external mixer to (a) provide decent pre-amps and (b) to connect all the line outs from the external synth hardware and such, and route them to your sound card.
But with today's sound interfaces, when they are hooked up to your PC and powered via USB, the PC becomes the mixer in a mixer-less configuration. Everything gets mixed "in the box", and you only need one set of speakers or studio monitors. Actually, you could still use an external mixer, but the signal path and learning curve becomes more complex, and is not really necessary in a basic studio setup.
Since you mentioned the Komplete Audio 6, here is a diagram from NI that shows a basic setup:

A few things come to mind here. The first is that the keyboard is shown using the MIDI cables run to the Audio 6. This would be common for a pro keyboard, but many controllers also come with a USB connection and/or MIDI, so you can run straight to a PC USB port which will be running a USB-MIDI driver. No audio is passed over the USB-MIDI connection, unlike the Audio 6 which sends both midi and audio as digital data over it's USB path.
All that being said, you voiced a desire earlier to be able to hear the internal sounds from your keyboard. So your next decision is going to be where to route your audio line outs from the keyboard. That is not shown in the diagram. The setup shown above will only let you hear the virtual instruments being played via MIDI control "in the box", over the monitors connected to the Audio 6.
There are a couple of options.
One will require you to fire up that PC if you want to hear your keyboard sounds, and with the benefit of being able to record the audio line out from your keyboard when desired. To do that simply to plug the line outs from your keyboard into the Audio 6.
The playing without a PC option will probably require another set of speakers or amp connected directly to your keyboard line outs, with no recording option for the audio from your keyboard. There are other options that could include an external mixer, but that is probably beyond the scope of this thread.
Best of luck to you and I wish you success!