Checking out the HW-FMC5 at Costco and the sale on this sound bar ends tonight. First, is there a difference between these two models and what is it? Which one would be better, since they are both the same price (165)? I noticed the reviews are better online for the HWF450 from Amazon...

I purchased a Samsung HW-FM45C Soundbar with wireless sub and a Samsung 6350 TV from Costco. The soundbar only has1 HDMI in and 1 HDMI out with a Digital out as well. I'm planning on getting a HTPC hooked to it as well as a Roku. Will connecting the HTPC and Roku via HDMI to the TV and...