You guys are making the mistake and assuming the 100-120k out of dental school is constant throughout your career.
Its not... There is a good reason why GP national averages are anywhere between 160-220k, its because those are career long averages.
You can hit nice incomes (200k+) with dentistry (yes even without specializing), but IMO, you need some years of experience under your belt before venturing off into private practice.
Now if you tell me you don't ever wanna do private practice (you hate managing), and your also going to be in more than 250k debt (including undergrad), I will be the first to tell you to look into another profession. Associates ,on average, don't make alot (almost irrelevant how "bad" the economy is).
Again, IMO, private practice ownership is the way to go if $$$ is that important to you.