i'm Megaworks 550 THX user, I'd been using AL 885 previously before this megaworks.
So far sound quality definately mega best the AL885 flat, althought sattelite doesnt come with tweeter. For Altec is good in bass, you can hear the bass got tune one when set to Prologic mode, unlike logitech the bass just got boom boom sound.
For Music Lover, Mega is ur choice, high wattage doesnt mean anything. When lowest volume, I still can ejoy my music as the sattelite produce the sound clearly, but AL in low vol i cant barely hear anything cause the bass will cover everything.

I bought for ~Rm600 from UK back then.