Naim newbie need upgrade path help??

hi all,

first of glad to report bought my first naim gear this past few weeks an seriously caught the naim bug.....

my recent purchase is the nd5 xs streamer with the xps dr arriving tomorrow (got it for really good price) now planning out my upgrade path but am really overwhelmed by the choice/options naim do 

System now is:

• linn majik 140 speakers (with the upgraded aluminium stands) bi-wired to amp with chord epic speaker cable 
• arcam a39 amp (is a real power house)
• arcam cds27 CD player (connected to digital in on nd5 via chord prodac)
• naim nd5 xs connected to a39 amp with the new chord tuned array epic rca-rca cable
• naim xps to connect to nd5 when it arrives
• nas is qnap ts251+ connected direct to nd5 with audioquest cinnamon Ethernet cable 
• power hub is clearer audio copper line alpha power hub 
• mains plugs for all are chord power cables (purple ones)

So for next upgrades was thinking following, but after advice for where I will get the most benefit, list so far is......

• naim ndac (heard best to connect xps to this an use the nd5 as a transport)
• Melco n1a with audioquest diamond Ethernet cable
• Upgrade amp not sure here either super nait2 (with hi cap dr) OR nac202/nap200
• Maybe second nap200 to bi amp speakers (or would the base amps above be man enough for the job)???

Anyhow as you can see so so many options....any help is very much appreciated 

thx mat