My HD-28 has the heavy finish on the back of the neck and gets sticky , it is like a thick varnish , i am not sure what the technical name of it is. I have the action as low as can be without alot of buzzing going on. It is also a long scale guitar and for me short scale guitars are easier to play. Long scales result in higher tension and alot of folks including me love the sound.
Martin sells the Om series guitars and the 000 series the Om's are long scale and the 000 are short , and that is about all the difference in them. 25.4'' and 24.9'' doesnt sound like much but to me the short scales play a little easier.