This would seem odd with text since TrueType is a Mac/Microsoft product. Still the more Mac and the less MS, the better it looks and the better it operates.
Adobe Postscript fonts are more hassle, but if you want top quality, they are still the standard.
ClearType is a use of LCD sub-pixel addressing to draw characters at a higher percieved resolution. TrueType is a scalable font technology.
The ClearType effect is startlingly good. LCDs not using ClearType look terrible once you are used to it.