@n777 - With regard to the difference between pro and consumer models, there are some in consumer that do not exist in pro anc vice versa. SCM40 has no equalivalent in pro, as its a sealed low end cabinet. SCM19 has no equivalent in pro, it is "warmer" than the SCM 20. SCM 7 has no pro equal. SCM 200 and SCM 300 in consumer are towers, no equal in pro as the soffit mount versions in pro use a different tweeter for reliability. There are some pro models that have no equal in consumer as well.
The 50, 100, 150 do have pro and consumer versions; Yes the differences are primarily the veneer, but the monitor versions have grilles (no grille in pro) and the tower versions are unique to consumer plus have grilles. Pro is in housed in the cheapest possible black paint MDF box because pro doesnt care about finish. Some have thought "oh the black is like balck ash or high gloss black- no its rough, has flaws, is not built for looks at all. Studios beat the hell out of them moving them around so a finish like we use in consumer is a waste. However, the consumer version veneer work is all hand done, one at a time, high gloss is literally 10 coats of laquer with sanding in between, veneers are book matched, inside is also veneered for pressure balance (otherwise the wood would bow over time). So this kind of work is very time consuming and expensive. The cabinet shop ATC now owns used to do custom furniture for a hot shot interior design house in London, so they are capable of some very impressive work. The can also do custom work, say a unique wood like European Crown Cut Walnut that is an amazing wood finish. The veneer is worth the money charged. It is not done by machine. Think "Bentley Dashboard" as this part of England is where much of that type of work is done.
(I am the US importer of ATC pro and consumer so I know what the facts are regarding ATC)
Brad