Ah well,
My patience seems to have paid off. I have a very sweet sounding D-15 right beside me here. I am glad I held off the OM-21 or
the D16GT I tried at the local shop last week. The D-15 is exactly what I was looking for. The saddle needs a little bit of sanding, and I might replace the medium strings with light strings. The workmanship on this guitar appears flawless, and the tone, well, it makes me happy. I am going to let it acclimatize to my place for a couple of days, and then lower the action.
It seems Thomann actually bothered to inspect this guitar before shipping. I decided to give them one more kick at the can after they promptly refunded my money for the 000-15.
As for Martins being a rip-off, my experience so far has been mixed, but for a solid-wood guitar in this price range, I can't imagine anything better. And the tone is sweet, mellow, full, rich, and really very much unlike a spruce or cedar top. A Martin is one of two of the best acoustics I've ever played in my life, the other one was a custom-made that cost over 3 large CAD in the early 1980s. The Martin was old, the laquer cracked all to hell on the top, but man, it played so smooth, sounded so sweet, I actually thought that I might want to mug the owner....

It must be worth a mint.
If I'd been back in Canada, I'd a gone into one or two of the local shops and tried out as many of the 15's they had in stock. I am sure that I would've walked away with one.
This guitar is SCHWWWEEEET!!!
Cheers,
MK