My collection arrived today! Sadly it does not have the English opening and closing themes, but a quick search on google and I found them in MP3 format. I'd love to know who they are by though as the quality could be better. I used to have the series on VHS. It was the only complete anime I owned, after I moved however I lost the videos and I was gutted. Now the series is available on DVD (although only region1). Personally I think it's a great little story and the dragons are beautiful.

The names of the brothers are quite significant as well. I only found this out recently. Please correct me if my translation is a bit out, but they roughly translate from eldest to youngest as follows:

Hajime
The begining
Tsuzuku
The next
Owaru
The end
Amaru
The future