I just had to sell my psp slim a while ago and i can tell you that the graphics are great on the slim psp. For games like god of war, crises core FFVII, and patapon, the graphics really do shine on a handheld. Even simple games like Luminus 2 look fanominal on that sleek design and if you are a graphics whore you will appreciate what some games do with the technology. My top 5 reccomendations to you smart new psp owner would be the following:
1. Crises Core FFVII - i promise it is the best game on the system yet honest, and talk about some cg cutscene graphics WOW!
2. God of War: Chains of Olympis - it is like playing god of war 2 on a handheld, and thats not bad at all.
3. Silent Hill Origins - this game is compelling, graphics great, and the game is a true blue psp gem that should be played.
4. Patapon - it is so ADORABLE but also challenging and addictive.
5. Castlevania Dracula x Chronicles - the game is a remake of a classic and a psp port of the best game in franchise, also cheap.
Honorable Mention - Luminus 2 - this is the game that you will play till the cows come home. the music is great, the graphics perfect, and the game never gets old. This is worth buying!!!