Best Types of CD-R Brands To Use:  (AnGeLk][LLa)

CD-R Media 
The following CD-R media are the best for backing up PSX games: 
Vendor Factory Dye Color 
Philips Premium Silver Taiyo Yuden BLUE 
Sony CDQ-BN / CN / BP Taiyo Yuden BLUE 
TDK Reflex TDK BLUE 
Verbatim DataLifePlus Mitsubishi Chemical Corporation BLUE 

This list is purely based on Experts (not me) experiences copying PSX Games.
 
I have had experience with the following and they work GREAT for 
burning PSX games:

Maxell
Acer
Pacific Digital