Hi - I am an owner of a L10C which i bought back in april this year through my local guitar dealer Gitarrengalerie - Karsten Görbig - in Bremen in Germany. I love this instrument. I already have a 1981 Martin HD28 and a 1991 Lakewood D32 but the Avalon is special. I use a lot of open tunings - current favourite CGDGGD - and i use Newtone strings - DADGAD sets for the Lakewood/Avalon and Custom for the Martin.
e.g. http://www.troubadour.uk.com/newtones.html
