Do i need a CD player, or can I use Mc Book?

Unfortunately RAID does not protect from controller failure, virus, lightning or simply operator's mistake.  That's why I keep 2 backup copies instead.  Second copy is an additional protection from something bad happening during backup.  Also RAID does not protect from fire, theft etc. while my second backup kept at work does.  In addition, unpowered drives tend not to fail.  RAID might be a good solution, but I would still make one extra copy.  Drives are cheap these days.

Once network (Ethernet, WiFi, Async USB) is used payback program does not make any difference (unless it is making additional processing - like oversampling).  It is because data and not the music is sent (no timing) while timing is recreated on the other side of the network bridge.  At this point nothing on computer side makes any difference (program, speed, amount of RAM etc) - saves a lot of money.  You can also use computer during playback (as I do) - it won't make any difference.

Audirvana might improve playback in S/Pdif streaming but does nothing to network playback since data is sent in packets of different size - not in the real time. The fact that Audirvana is caching is absolutely irrelevant with the network connection.

Shure I will have more serious problems when my house is on fire, but thats why I don’t want to have more. In addition It took me long long long time to rip about 2000 CDs and I don’t want to loose it.

Williewonka, assuming that all bits are being sent (bitperfect) without any processing the only thing that can affect sound is jitter.  In case of NAS, WiFi or async USB minimizing timing errors made by computer by caching does not make any difference since different clock is being used on the other side of the bridge.  It can only make a difference in real time streaming like S/Pdif.

I had also 1 second drops with WiFi.  I found later that it comes from two sources:  from the routers of my neighbors and from my microwave (and possibly neighbor microwave).  There was only 12 channels to choose but each channel occupies 3 channels width - very easy to collide with other routers.  My microwave worked at identical frequency as one of the channels cutting off the music.  Finally I gave up and bought dual band router.  Now, a lot of channels to use and very low traffic (5GHz is not very common), but also 5GHz poorly penetrates obstacles like walls shielding me from the outside.  Since then I have no drops at all.

You're right - backups are so easy now.  To make backups that my Mac does automatically (Time Machine) they had whole departments of IT people before.  Also cost of media is insanely low, like  5TB Seagate drive in Costco for $119.  Taping albums was very common form of the backup but tape left unused were known for layer to layer copying. Large recording studio, where my friend works for about 30 years, had procedures to rewind each tape in huge archives.  It all ended with digital recorders.