I love my Neo Geo Pocket Color as well. I just finished Biomotor Unitron for probably the fourth or fifth time. All the puzzle and fighting games are awesome too. There is actually one NGPC missing from that picture but the two in the picture have front light mods.
You are dedicated if you still play the original GBA. I used to love them but I won't even hardly use it anymore. I only have one to use for Pac Man VS when we link it to the gamecube for 4 player Pac Man. I use the original GBA is because it's hard to see so it makes it harder for whoever is playing as Pac Man.
You should pick up a back lite model GBA SP. I can not even put into words how much better it is then the original GBA.They are getting harder to find though. If you do look into getting a GBA SP make sure it is a AGS-101 model. That is the 2nd version back lite model.
The 1st version GBA SP has a front lite which is a improvement over the original GBA is model AGS-001 but like I said the back lite model is a whole new world of awesomeness. Surprisingly a lot of people don't realize there was two different models of the GBA SP.
If you ever want a Micro I might sell one. I have way too many of them just because if I see a used one in good condition I buy it. They never really got the love they deserved so I take them all in. I am like a homeless shelter for unloved Micro's.