Canary CA906 vs Sunfire Classic Pre -amp.

This may be a stupid question but how do these compare? but I have a chance to buy either one.
The Canary is a 2 chasis 6sn7 pre amp and the Sunfire I read sounds as good as high end units. I dont care about the cost as the canary is more expensive but is it better? I currently have Canary Ca160 monoblocks and Martin Logans.
The Canary is a good sounding unit, well made too, and since you already have a set of Canary 160 amps - I'd go with the Canary.