Seems like lots of people have had good luck with those types of amps, which are sometimes referred to as "Pro sound" amps. In addition to the Crown, folks seem to like QSC and Behringer.
I have no experience with them and don't play my system at levels that would require more than the ~130 watts generated by my receiver or similar models.
It looks like that Crown you linked to only has XLR inputs, which certainly makes me wonder what sort of processor you might use with it.
Not much risk at that price - if you go for it, please post your experience.
Good luck. Enjoy the journey.
