Justify me a PSP?

I have an opportunity to get a PSP for $150 that's in semi-used condition.  I have a DS and don't use it all that much, but I prefer that system better.  I'm not too big on most of the titles coming up, but if someone can name me THE #1 REASON to get a PSP (I already have an iPod and laptop, so no need for connectivity, all I want is teh gaemz) as Halo was for the Xbox and all the decent RPGs are for the PS2, I'll probably end up getting it. 

The catch is that I'm about to spend $80 on Osu! Tatakae! Ouendan and Cooking Mama, so it's going to be one or the other.  I know that $150 for a PSP is a very good deal, but I don't see myself using it as much as my DS, which is only on long car or shopping trips (the girlfriend takes some time to try on clothes and shoes) or to feed and take care of our Nintendogs.  I like the DS for what it can do with the interface, but the PSP is the powerhouse and has MG Acid, which I wasn't uber-gung ho to play, but would if I could.

I have no plans to watch UMDs, and while I'd like to put old ROMs on the thing, it isn't an absolute necessity, so firmware isn't a concern. 

So?  Should I go for it?  What games are absolute must plays that are only on the PSP?

lumines :D

And i surf 4chan on my psp and post.

reason enough right there

>>2
I have Rez and I'm not too big on puzzle games. 

>>2
So does it take you 5 minutes to type one sentence?

it takes 6 mins to load a game

DS is superior. It has a web browser too, and the games are funner than any PSP games. (save lumines)

parachute on my iPod is better than any of the handheld games out right now

Honestly, it's a cool accesory. Thats it really. For right now at least.

Lumines is great, still playing that. Same with metal gear acid. My friend has socom for it and says its fun, the megaman x remake is great(only $30), and that monster hunter game is something im keeping track of, as is breath of fire 3.
Also, if youre a metal gear fan like me
http://media.psp.ign.com/media/791/791367/vids_1.html not a game, but i think it's awesome. Love the artwork in it.

Oh, and if all else fails, homebrew. And porn. Lots and lots of porn.

>>8
Homebrew runs rather slow without sound.. I think I heard something about someone actually getting the DS to emulate games...
http://www.double.co.nz/nintendo_ds/
http://nintendo-ds.dcemu.co.uk/
http://www.ndshb.com/

All I did was copy from google results, so, I don't know how up-to-date homebrew is on the DS, or how easy.

sell your ds and save money for ds lite. I got a psp for free, i was going to buy a ds when i had the money but instead for some reason i bought a 1 gig memory stick instead, now i never use my psp.

>>10
I sold my PSP for 127 or 129 (I forget) at the local EBGames/GameStop
Someone at school later offered me 200 for it, plus an extra 50 for my 1 gig card. Wish I had waited one extra fucking day... PSP was immaculate too, I had only used it once, and the moment I opened the box I pasted on one of those screen protectors~
So, instead of getting 250 for the PSP/Card, I ended up getting 177/179... So, take the time to find someone who's willing to buy them for a good price.

Yea, DS Lite looks nice, I was thinking of jumping the gun and importing one, along with that Opera Browser from Japan (assuming I can).
I am going to keep my DS though, I was reading up on modding it, and I think I could use it for learning experience, if not turn it into a full-on emulator for whatever.

Five words: Street Fighter Alpha 3 MAX.
Unless you're in Japan, then it's six words, replace MAX with Double Upper.

>>9
WithOUT sound? I think you're mistaken. NES and Gameboy roms run perfectly on it, and most snes games run great with sound and a few tweaks. If you turn off the sound they just run better.