The GB Player is nice if it's your only option (and if you have one of those Hori controllers designed similarly to the SNES controller), but it rubs a layer of vaseline over the entire image (even on sharp settings), forces letter and pillarboxing over the entire image instead of offering a pillarbox only option, and that Z-button overlay is one of the most annoying things Nintendo has ever done. And it looks pretty bad on an HDTV. If you've got an HDTV and a Wii U, take a look at GBA Virtual Console titles, then compare them to how they look on the GB Player -- there's no contest.
For my money, the Retron 5 is the best way to play GBA games on a TV, though it's sadly still a work in progress -- the emulation isn't up to snuff for Metroid Zero Mission yet (slowdown, though they're fixing in a future update), and it doesn't handle GBA save files very well currently. Anyway. Just my two cents. Glad you guys all love your GB Player, but there are better ways to play on a TV.