I've got all four soundtracks and I recommend them very highly. They're amongst my favourite scores and they're more than good enough to seek out the originals on eBay or something. The production is top-notch and there are liner notes by the composers.
Two of my absolute favourites are McNeely's Verdun and Rosenthal's Barcelona.
There's also a 'promo' of the Transylvania score by Curt Sobel.
I really hope that with the DVD releases and the renewed interest, Varèse Sarabande or perhaps Intrada will be able to release the complete scores to the series (or at least a few additional volumes...).
I don't know about how the Indy community in general feels about this though - is more music from this series much requested?