Can someone please send me a link to a decent/not too expensive 4channel amp that puts out 50watts Rms x4?

Or if u have a better suggestion.. Im lookin to power my interiors Front doors- Alpine Type S 6x8 (believe they are 50watts Rms each spkr. not totaly sure) and Rear deck- Memphis PR-692 6x9 (60 watts Rms each spkr.) Want a decent 4channel amp that will power them perfectly but not too expensive (and relatively small in size if possible cuz my kenwood excelon for my subs already takes up alota room) thanx to whoever can help me with this!