If your preamp has balanced outputs, then an upstream component with balanced connections of course could be used, however if you are not using extremely long interconnects or have a very hostile environment, then the balanced circuitry is more likely to cause signal degredation than any improvement. Frankly, if I had a component with balanced outputs, I would still run it unbalanced.

Balanced circuitry's only reason for existance is to cancel hum and noise picked up by long cables (25' or more) in situations where they have to be routed near sources of EMI/RFI (motors etc), as in a large studio. A balanced connection will NOT in and of itself "improve" the audio signal. Quite the opposite, since the amount of active electronics is doubled at the sending and receiving ends of the interconnect (and completely doubled throughout in a fully balanced component), the audio signal has to go through twice the amount of active electronics - this is always best avoided since it causes more noise and distortion than a simple unbalanced circuit would contribute.

In audio, simpler circuit paths are always cleaner sounding than a complex one. Adding complexity as in the doubling of active electronics (op-amps) in the signal path when not needed is certainly not going to improve the sound, but only make it worse.