Hafler DH-200 & Nakamichi PA-5 for bi-amping?

Both amps are sounding great. I just got PSB Image T6 speakers so can now try bi-amping. Both amps are S/S 100 W/ch. Question is, which would you guys use for the tweeters and which for the mid - woofers?
I could try them both ways, but am just wondering what the concensus is from you guys.
Hopefully, the sensitivity(voltage in/power out)is matched, between the amps. The only way you'll know which sounds better(which amp for which driver) is to try it for yourself. Happy experimenting.