5.1 under 4k?

The Apex sub of Monitor Audio is cheaper and better then the RX subwoofer. Most other sub's in this price range are a lot less fast in speed than the Apex Sub. I never sell the RX sub, go for the better and less expensive Apex sub. Next step go for an Onkyo Amp. You will hear how much more depth and wide it has compared to the Marantz. Drive and individual focus of instruments and voices is superior to Marantz. Why? Because the transformers they use deliver more ampères. I am surprised you bought the speakers this fast. Marantz can not give a deep and wide stage. That is why it is a 2-dimensional brand.

Bo1972 - you sound like a dealer. If that is so, you should identify yourself as a dealer and reference your company. That is pretty standard on Audiogon. Many people in the business post here, but you should identify that.

I think you made some good choices. I had the 2nd generation Silver S8's myself and really enjoyed them. I'm sure the newer version that you have will sound even better. Also, I think it was a very smart move to go with the better centre channel. I'm not too concerned with HT, but the one thing I see quite often is that the centre channel sometimes has a hard time keeping up with the main L&R channels.

As far as a sub goes, I would just wait a while until your speakers break in and you have a chance to get to know them. Doing it that way will make your sub selection easier.

What I said earlier I do consulting in sound and vision. I worked for over 8 years in audio shops. I want to do thing differently and I needed more space. I love the freedom I have now.

I have had an Onkyo A-9555 integrated amp for five years. For the money it was a good amp, but no way can it approach a Marantz PM8004.