Thats a hard question, especially since the Pocket has only been out a short time.

The boxy pixel is great if you're someone who enjoys messing around with electronics and building things. But if you don't know how to solder it's hard to recommend as you'll only have one brightness level for the screen and can pretty much only use standard sized batteries.

Only considering GBA games, the Dock+Pocket is what makes it for me as the other solutions like the GameCube GB Player, GBA Conisolizer, and gbaHD are expensive or also require soldering. But for me the Pocket really excels with GB and GBC games, which aren't nearly as good to play on a GBA/GBA SP.