...the Schumann Quartets in their original form, but these transcriptions are superb, and in my opinion, the form enhances these works...
In what way?
Only since my first hearing of Korngolds serenade have a started to appreciate music for string orchestra - I used to find 'just strings' quite obtrusive, and preferred either music for full orchestra (with lots of horns & trombones!) or few strings, i.e. chamber music.
Beethovens late quartets are being performed by string orchestras more and more, as was always the case with his op.95, Schubert's 'Death and the Maiden', Verdi's quartet, and, of course, Tchaikovsky's sextet. Gidon Kremer has, together with his fine Kremerata Baltica, in recent times played and recorded Schubert's last quartet, his famous quintet and the Adagio of Mahler's unfinished 10th (and more which I can't think of right now).
I love arrangements of famous (and less famous) compositions, and find nothing wrong with recording them. BUT I do find this criticism of some chamber music being '(too) orchestral' / not contrapunctal enough (and performing it with string orchestra for that reason) rather ridiculous. For me, wenn it comes to music for stringed voices, the famous 'less is more' applies. The regularly criticised 'orchestral effects' represent for me not a matter of taste, but a lack of knowledge of (or a very conservative stance on) music history. What if the composer made it sound that way deliberously? How about Schumann and Liszt composing 'symphonically' for piano? What about those chamber music moments in orchestral works, for instance in many Mahler symphonies? Or Schubert's 2nd sonata for 4handed piano? No one (nowadays anyway!) criticises those, although they could be considered 'unidiomatically' composed as well. It's the chamber music that gets the raw deal, here. I find it a tad lame to regard the Tchaikovsky quartets as anything else but chamber music. That's what they are.
SO, here you have another friend of 'orchestral' chamber music. I recently returned to a recording of the beautiful 2nd Brahms quintet in an arrangement for string orchestra. Very fine, indeed, but it also made me realise the original is much, much better.
Regards!