Proac D15 versus....

Hi, I'm curious about that newer Proac model the D15 (what's up with this new numbering scheme? What was wrong with 1.5, 2.5, 3.8..)

Anyway, have any of you compared this speaker to others I've tried in my home: Proac 2.5, Spendor FL9, Thiel 1.6 or 2.3? Or other speakers? How did they compare?

How LITTLE power have you successfully powered a D15 with?

I'm trying to find a speaker that is totally happy with Cary SLI-80 triode 40 watt mode. My Thiel 1.6s are very very very nice, hard to beat actually, but I suspect the 3 - 4 ohm load is limiting dyamics for a 40 watt triode amp. Tried my friends Proac 2.5's but the Cary just did not control that speakers famously deep bass adequately. The D15 is a bit more sensitive (88 vs 86 at 1) and a bit less ambitious bass-wise (30 vs 20hz) so I'm wondering.....

Thanks,
Art