I'm looking to invest in an additional Amp & CD player specifically for Audio. I currently have a Marantz PM711AV and Pioneer DV444. Speakers are B&W DM603's and cables are Cable Talk 3.1. Sub is a JBL. (Fine, in my opinion, for movies but seriously lacking for audio)

Before my PM711AV I had a Marantz PM35MKII together with a Marantz CD?? (and at that time some Wharfedale bookshelf speakers). It was used in my small bedroom and I really liked the sound as it was less harsh and not as clinical as the others I had tested. It was a similar sound to my phono with extra clarity.

As that was nearly 20 years ago i'm sure things have come along way since then. I now have a 40Sqm living room with wooden floors. I'm considering the Marantz PM7001KI and the CD7001KI. My question is two fold: Should I be considering any other combination and if so what? If I do go for the Marantaz as mentioned is the "KI" really worth it?

Another question is can I wire up two amps to the same speakers? Obviously I will only have one amp switched on at the same time but would having two amps wired to the same speakers reduce sound quality to a level that is audibly noticeable? How should I proceed? (I would like to bi-wire which may also cause additional problems connecting the two amps to the same speakers)

All advice is appreciated