which amp would be suitable? looking for suggestions?

[twol]

i also have the onkyo tx-sr875 and doubt very much if ceiling speakers are the way to go,my bad boys are the klipsch synergy range,2 floor standing,2 rear,2midway centre and 12" sub.
for the power of these amps may shake the ceiling to bits.
running cables can be a pain as they are heavy.
satellite speakers by wifi?

I use the Kef wifi speaker extender (forgotten what they call it) for my rear speakers, so provides cable less speakers that can be placed anywhere.
They are in an area suurounded by other wifi boxes (including 2 wifi routers) that could cause interference but apart from the very occasional "blip" they run perfectly.