The PSP-3000 screen has earned both criticism and praise. It’s brighter, crisper but has interlacing issues that display horizontal lines when viewed closely. When the PSP screen is viewed extremely closely though, say under a 40x microscope, the issue’s source is apparent.
The new screen has lays out the pixels horizontally, verses the old screens vertical design. Additionally, the new screens blue cells are brighter and more vibrant which accounts for the both the better colors and interlace lines. The chaps who conducted the test, Logic-Sunrise, suggest you purchase an older PSP, but unless you hold the PSP 6-inches from your eyes, you probably will not see the interlacing issues so try out one of the new models before you buy an old one.