Rate my system/advise

Edit for spelling advice, advise.

Hey, I am new to hi-fi. I have been building a system, and I have not set it up yet to listen. I demo’d the speakers before purchasing, but with different equipment. I was curious of opinions on my purchases, and what room there is for improvement. I had bought the amp’s early, which are old, and hoped to make up for it with the preamp.

McIntosh MB100 Media Bridge

Audio Research Reference 6 Preamp

2 NAD 218 THX’s (each in bridged mono)

B&W 803 D3

Nordost Tyr 2 IC (MB100 to ARC REF 6)

Ansuz Diamond Signalz IC (ARC REF 6 to NAD 218 THX)

Nordost Heimdall 2 Speaker cables

Nordost Heimdall 2 Power cables

Nordost Reference jumpers

I am about to purchase:

Butcher block acoustics audio rack and amp stands w/

IsoAcoustics Orea Isolators

Rebel Sky Acoustics Diffusers

Auralex Deep6 Low-frequency absorbers