There’s some awesome mods to restore headphone jacks in the SP, but I myself prefer the original GBA form factor anyway.

Actually, my preferred ways to play GBA are in the following order of preference:

Analogue Pocket GameCube GameBoy Player (with a SNES controller using an adapter I intended to link but the Etsy shop appears to be gone now) MiSTer GBA core OG GBA with a screen mod