[Lilux-help] Fonts, Monitors and Graphics cards

Hi all, I have successfully installed Slackware on both my test machine and my laptop. My test machine has a parallel Windows partition, and my laptop used to be running Windows. However, I have the impression that on both machines, the quality of the graphical image (under KDE) is not as good as with Windows on exactly the same hardware. My basic question is: what is the most likely cause: -1- the fonts used -> i.e. would using the Windows TTF fonts make a large difference ? -2- the configuration for the monitor? For the desktop, I have put into xorg.conf the values I found in my monitor's book; for the laptop, I couldn't find the information yet so I left the defaults. -3- the graphics card driver? The desktop has a ATI Radeon 7500, and I use the X.org "radeon" driver. For the laptop, I ended up using "vesa", short of anything specific available for an ATI 3D Rage LT Pro. Any hints are welcome. -pu