I have had great results powering my Forest Signatures with a Plinius Hautonga (200wpc SS integrated), Audible Illusions S-120 (120/240 wpc hi-current, hi bias SS amp), and OG (made in France) YBA 2a HC (70/140 wpc, class alpha) and YBA Passion 600 (250/500 wpc, class alpha), all fitting within the 'give it plenty of juice and it will sing for you category' (and all with a tube preamp, except the integrated), however I may have an opportunity to try a McIntosh MC275 mk IV, which I am told is a match made in heaven (even though it doesn't fit the formula), due to the Mc's particular topology (in other words, not every tube amp will do it, but supposedly that one will).
We shall see...