Last April 3, I bought myself a Nintendo DS Lite for about Php 10,000. Included in the package was an R4DS (a slot 1 "cartridge" you can load up with NDS ROMs, MP3s, and other media) as well as a 1GB micro SD memory card. It was the best 10k I ever spent.
Right now, I'm trying out all sorts of games, owing to my gaming ADD: from the side-scrolling action of Castlevania: Portrait of Ruin to the weird RPG goodness of Contact. Other games that I'm currently playing include: Phoenix Wright 1, Elite Beat Agents (and its Japanese counterpart whose name escape me at the moment), Hotel Dusk, Megaman ZX, Mario & Luigi: Partners in Time, and Age of Empires: The Age of Kings.
Surprisingly, the title that made me buy an NDSL, Puzzle Quest: The Challenge of the Warlords, is getting very little play time despite all the hype and raves from US fans, particularly Penny Arcade.
Now, I need only two more things for perfect handheld gaming: a slot 2 flash cartridge that will allow me to play GBA games (and possibly GB/GBC as well) and a wi-fi dongle (to connect to the Nintendo WFC).