Xeon7222:
AC-3 n DTS are decode by software, eg: power dvd, so S4.1 can play it.
U can add a independent center speaker to S4.1 but it is not recommended, coz it will sound different and the center speaker ONLY works on DVD when the actor is talking.
For me the S4.1 center channel is "really" comes from center. U can really tell when u use the speaker channel test from the soundcard driver.
I'm a satisfy user of S4.1, S4.1 is not only sound good for music, on movie or gaming, it will not lose to R501MKII due to it's higher clarity which means it's sound more realistic. Besides, it's bass also hit harder than R501MKII.
It is not easy to find a speaker that sound similar/better than S4.1 at that price range. (Depends on ur taste)
I hope u can test both speakers urself in the showroom in lowyat.
thx for ur advice.
but i m staying in melaka....so....
nvm la, i ll test in in the other shop.