These sorts of questions really all come down to personal tastes, expectations, and, to an extent, personal wealth as well.
I happily spent about that much on my 17" Drill Press, so I guess that means that a drill can certainly be worth $575, even in my book -- though my drill press is by far my most expensive 'drill'. My Bosch rotary hammer drill (SDS+) would be my second most valuable drill at around $240, but it does a job that no other drill can (at least not practically).
The quality, reliability, and reputation of Festool tools are truly second to none IMHO (and for the sake of full disclosure, I own no Festool items). The integration of many of their tools, especially with regard to dust collection, is genuinely unrivaled to such an extent that I would consider them almost mandatory if I were in the business of high-end remodeling with clients concerned about construction dust and cleanup. If your business depends on such tools it is much easier to justify them regardless of cost (and you can also write off much of their cost in good years as well).
I would not personally spend $575 on a portable drill, but then I don't earn a living with my tools either. As a hobbyist and DIYer, I chose to go the route of inexpensive (and if need be, expendable) cordless tools (mostly Ryobi 18V and 12V) with a focus on investing in quality corded tools for when I need the extra power and/or ruggedness of such.
There are many who would consider the $150-160 that I spent (years ago) on my, then new to the market, Bosch 1590EVSK Jigsaw -- especially in a world where you can pickup a Black & Decker Jigsaw at Walmart for the likes of $30. But if you have ever used such cheap jigsaws (and I certainly have over the years -- in fact I own a mid-priced Craftsman Jigsaw), and you pickup the Bosch Jigsaw and start cutting, it won't take you but 30 seconds to become a believer in the value of a quality tool. It is so rediculously smooth, accurate, and easy to control that it makes me smile every time I get the excuse to break it out and put it to work. That was my first real introduction to quality power tools and made me a firm believer in their value. I opted for cheap and expendable cordless power tools (namely Ryobi), but I invest in quality for nearly all my corded power tools (e.g. DeWalt, Porter Cable, Bosch, Fein, Makita, and so forth).
Just my $0.02.
