Maybe you would like to drop-by at The Adelphi?
A number of specialized audio shops down there. Some of them are more than willing to offer their professional advise on basic audio system setup, depending on your budget
They are also selling amps separately at a reasonable price.
Currently, I am also contemplating on the audio setup for my new home. I've narrow down on 2 systems, Yamaha and Onkyo. While Yamaha amps excel in clarity, Onkyo amps pack more punch. And coupled with Jamo speakers, man, you can blow the house down.
By the way, there's a Onkyo HTIB (Home Theatre In a Box) model HT-S990 going at around $1599 at Best Denki Tampines. The first THX certified HTIB. But be warned of the speakers size though. One drop on your head can send you straight to seven heaven....