Harman Kardon Pre amps

I'm looking at the Harman Kardon Pre amp's The Signature 2.0 OR the Citation 7.0. Can any one help? Witch one is better and why?

The best HK preamp was the Citation 1 :)
Agree with Atmasphere. But they also tended to become rust buckets....Not easy to find a clean one and most if all of the stock electrolytic caps need to be replaced.