Wow, I haven't listened to Enya in ages! But I do think Watermark is a beautiful album and yes, best enjoyed on a good sound system. I also have The Memory of Trees .
The first time I remember hearing Orinoco Flow ... it was when it was used for a coffee commercial! Does anyone remember that? The first time I listened to Watermark I had no idea then suddenly ... sail away, sail away ... hey, that's from that coffee commercial! Since then I've managed to put the song back into perspective and I think that's a cool tune on its own.