Well, the mcs333 i think can do the job as a compact HT but rated at 145w power consumtion, i suspect its only around 25w rms x 6ch (note that the subwoofer is passsive & will get power from the receiver). Looking at the specs, the mcs333 is well equipped except for the power output. 1000w pmpo is misleading, but at around 25w/ch rms is good enough for a small room. For the karaoke function during parties, turning the volume excessively will surely break the tiny speakers off and eventually burn the power amps. As i have mentioned in my previous posts "pwede naman ipilit" just be careful with the volume. You can do your karaoke thing on this unit at normal listening levels lang. Another option is to buy karaoke (designed) speakers (use only 4ohms as required by the amp) and every time you feel like singing, just replace the small ones with these. But it doesnt mean that the volume of the sound will be any louder since the amp as i said is only at around 25w rms. But rather, the speaker will be able to accommodate a little more freq range that the sats are not able to, to prevent it from busting the speakers at louder volumes.
But the most important part of this exercise is your enjoyment. If you think you will enjoy using the mcs333, then go for it. But of course there are gazillions of options im sure the other readers also have solutions to your requirement. Ciao!