Thaiman, As well I am in no way knocking the superb reports you have made on them, far from it. I have been amazed over the last 30 years how really good kit can be modded onto totally new levels.
Stuff like Quad, Rogers, Meridian, even Ken Ishiwata's Marantz M6 Signatures Mono block amps!
With the ART Emotions range the only difference in the thousand of pounds cost is in the cross overs and internal wiring, the component costs being about 20% of the retail prices!
The skills to build Cross over units I would say are reasonable, certainly above starting out levels, but it is not rocket science if you know your away around circuit layouts and more importantly the right components to use.
When the music starts to grab your attention (and not the Hi Fi) you know you are getting onto something special.IMHO
Samsung LE46M86, Onkyo 875, Sony PS3,RDR970,BDP-S350, Modded MA RS8,RSW12,RSLCR,RSFX. Soundstyle WG3AV, QED SA XT/Kimber4TC,Classic Powerkords, Audioquest Quartz interconnects, Mains:-shielded spur. BT MTU's, Bi-amped fronts /bi cabled fronts,centre.