Guys and gals, RR-Track is the cats-meow of track-planning software with just about every track and accessory library you can imagine. They're an OGR magazine advertiser to boot. So spend a few bucks and go with the best there is. Your own time is worth money, so look at it that way if you need to justify the number-crunching.
I run Parallels on a small Mac-mini computer with Windows 7, that I boot up as needed when running a few Windows-only apps. It's not a big deal in the scheme of things.
David