IMO S330 > R1900T3

C3

i think his problem is might because of his dvd player doesn't have 5.1 analog out. not all dvd player got 5.1 analog output. R501 doesn't have digital input, so u must have a analog 5.1 out to fully use the surround sound.

digital input not = necessary nicer than analog, it has to depend on whether the DAC build in on the speaker is nicer or the sound card. Digital connection means the speaker must have build in decoder and hence the decoding done on the speaker side, whereas analog connection is decoding at sound card's DAC then only send analog signal to speaker. AFAIK, the DAC build in S530 is normal only, a good sound card like prodigy HD2 should be better than that. most of the stereo system i saw is using analog. digital connection is mostly used on surround system like logitech Z5500 which have build in THX Certified Dolby Digital, DTS Decoder; or some AV Receiver like Yamaha, Denon... all these is for DVD Audio and Visual in Surround system.

KiAN008: Digital Audio Connector have two type, optical and coaxial. google on the name u will able to see the picture of it. to further confirm, check your computer motherboard brand & model, go to its company site to check the specification, or u can give me the model here, i help u check. some motherboard will have build in digital output, but very rare. IMO, u doens't need to pay attention at digital thingy on S530D. just my 2 cent