Pro Logic vs. Dolby Digital, DTS etc

I agree with Ronin. Big jump from Prologic to DD. Full range with distinct channels and a dedicated LF effects channel. Not much software for DTS. If you wanted to save some bucks could get a good deal on DD only unit. Also note that if you are thinking of geting satellite, there are good prices available on DD sat receivers.

Sugarbrie- my understanding is that dolby surround was first generation technology (no center channel), Pro-logic second generation (center channel carries dialog and most info, surrounds are not discrete and with limited freq. response) and DD is third generation (5 discrete, full range channels plus LFE, thus 5.1) A big step up from one generation to the next. DTS is typically considered "better" but it is evolutionary, not revolutionary. Not sure what the difference would be between a "good" prologic and a mediocre DD unit would be. Since my HT is discrete from my audio system, I have not gone hi-end for the audio aspects of that system. However, I noticed a big difference between the pro logic on my NAD to the DD on my Yamaha. Broimp, if your Mac has the right jack set, many DVD players provide DD/DTS signal decoding which could be fed to your Mac.