Ok, for a guy or gal wanting to primarily collect JP Hu-Card games, but also play all exclusives to US, play the text heavy games in English, and have Enhanced US versions over JP, it seems the list is something like this: -
Cadash (minor text maybe missed in JP version)
Darkwing Duck (US Only)
Falcon (US Only)
Gunboat (US Only)
Magical Chase ("Improvements" over JP version, although cost might outweigh it)
Military Madness (Nectaris in JP, Not playable due to text)
Neutopia (Not playable due to text)
Neutopia II (Not playable due to text)
Order of the Griffon (US Only)
R-Type (on one card and minor improvements to flickering, although slight resolution drop)
Tailspin (US Only)
Does this look about right?