Pragmatically-speaking, image rendering or choosing another font are the only way your site is going to look good on a Windows (or other, non-OSX) machine. You're correct in that the font-rendering used on Windows machines is geared toward different goals that that on Macs, but that fact doesn't make the web page look any better to the user using a PC.
And they're going to blame you for using a custom font, not Microsoft.
I don't understand the point of your sarcasm in the first line. The idea is that Mac users are overrepresented in the web-designer community vs. the user community. So in essence, there exist a significant number of websites that appear to have never been tested in non-OSX browsers, for it they were, it would be apparent to the designer that they look like shit in those environments.
And they're going to blame you for using a custom font, not Microsoft.
I don't understand the point of your sarcasm in the first line. The idea is that Mac users are overrepresented in the web-designer community vs. the user community. So in essence, there exist a significant number of websites that appear to have never been tested in non-OSX browsers, for it they were, it would be apparent to the designer that they look like shit in those environments.