I heard the RB1070 power a pair of $3000 BW 70x speakers (I forgot the number) vs my HK330.
Boy... there was a definite difference! In imaging, in separation, in black-ness of notes, in soundstage width and dimensionality. The Rotel just gave BW what I would call.... FOCUS and LIFE! The HK330, on the other hand, had the BW speakers playing to the tune of "this isnt impressing me".
I should've brought my LSi9s to the store, but I didnt.
I settled on the 1070 because I feel that 200w @ 4ohms is enough for the 9s (for ANY bookshelf for that matter) and I didnt feel the need to splurge on the 1080 or anything greater.
I'll be selling my HK330 and using my Headamp GS1 as my preamplifier.
The GS1 is a $750 headphone amp/preamp based on a discreet circuit and pure class A input/output.... so I am pretty sure it will handle the load real well.
If not, then I guess I'm off to get the Rotel RC1070 preamp... but I dont think I'll be needing to.
Countdown... 1 week until delivery! ;)