Oh my.... what in the world is that amp!!!!
I must say this is the most radical looking amp i've seen compared with the ones mentioned so far.
It is a pro amp. For the equivalent type of product from other companies, you can look at Crest, QSC, Behringer, and the like.
If you buy this separate type of amp, you are going to need a pre/pro. Another electronics piece to research, and again, IMO, you're possibly wasting valuable time by not focusing on speakers for the moment.
That pre/pro will need XLR outputs, and if not, you'll need adapters to use the XLR inputs (notice there aren't any RCA inputs).
There is no matching amps to speakers, except for the amount of power to avoid clipping. Do you really think a speaker designer would implement one type of compromise over another, just because it might match better with a certain amplifier? C'mon now.
...the site states it was meant or should be paired with yamaha speakers...? is that to be the case.. any speakers that would go well with this yamaha amp..
As stated, there's no need to match sonically with amplifiers. That said, Yamaha monitors have fared very well here in this budget speaker shootout:
http://www.audioholics.com/reviews/speakers/bookshelf/budget-bookshelf-shootout-2009
However, I imagine that a pro amp like that Yamaha could* be overkill for some of those speakers (even if overkill is not necessarily a bad thing). The Behringers that also did well are talked about quite a bit at these boards as a serious bang for buck. Excellent offaxis response for the money, with perhaps the compromises of power handling and extension.
Pro monitors usually don't come with any grilles, fyi. I'd throw in KRK as another candidate if you're considering them.