i believe the reason why theres such thing as back focus and front focus issues is that its a consumer camera.. A mass produced, cheaply available (although people would argue $2k isn't cheap), low QC tolerance camera..
Look at it this way, by understanding back focussing, its not a inherent fault of digital cameras, its heavily due to tolerance levels in components used for making the product.. You want a better product? pay for it..
the argument that $2k isn't cheap.. its relative actually..digital cameras start on a higher initial cost than say, a film SLR or even a film compact
$400 would barely buy you an average digital compact, but it gets you a damn good film compact (or even better, maybe an entry level SLR)
so if theres such thing as a $1k film body.. or $2k film body, what makes you think that a $2k dSLR is comparable to them? Its like, they spend this amount of money making the body (mount, shutter, controls/dials) you still have to have extra money to make the sensor, and I don't think thats cheap.
basically, if you don't want to have front/back focussing issues, pay for it...
I don't have money. so I get a D70.. I know what it can do, I know what are its limits, of course, I have my complains, but $$$ doesn't allow me to complain too much