PSP or Nintendo DS Lite?

I can't decide! I want buy lahh!! hahahha. It all started due to the lack of entertainment in my house. bleahs. all i got on my comp is o2jam. maplestory is a thing of the past pls! and there's no other interesting online game i can play(partially due to the lack of time). so i've decided to buy a handheld control so i can play almost anytime i wan! especially since travelling to school and home is quite a journey. woohoo!!

SO how how?! i read their reviews, it seems that they are good in their own ways leh. but i wan the positive aspects of BOTH of them! RARH!

PSP is so big. ds not very small but smaller relative to psp. hmm..
PSP got nicer graphics! ds oso not bad but then so gameboy-ish.
DS is interactive! especially the touchscreen. but psp can do so much more, like mp3.

bleahs so many other things to compare..HOW!
(actually i think i may end up not buying any cos of a certain parental objection BLEAHS)