There's a great firmware update for the 5K !
But it's not free...
It's called "A BRAND NEW PROFILE 2.0 BLU-RAY PLAYER" and it's made by a few well known companies (you know: Panasonic, Sony, JVC, LG...)
I bough one from LG (the BD360) and it plays every Blu-ray disc I own and rent with amazing quality. It also plays AVIs, mkv HD files, AVCHD, upconverts DVD and it even streams YouTube's crappy videos !
And it's a fast loading sonofagun !
Not bad for 250$ !!!