hi habitat
have to agree with GTB. I have a 149 quid Brunswick 12 and action wise its my best gtr to play. i keep it tuned down a tone and use a capo and i can play a root Bb on it without duffing any strings- something i seem to be a bit crap at on my 6 strings
i use light guage strings and it didn't need setting up again. don't have a problem with the dusty end as a: its electro acoustic and has a cut-away and b: i don't get up past 14th fret much
but tuning it down helps a lot with the tension and i'm paranoid about it folding up, although as shiny thang has pointed out, he finds it hard to believe that manufacturers wouldn't take the extra tension into account - and he knows a bit about stresses and strains - it's a big part of his day job i believe !