There's also an X68000 version, which is a spot-on port plus an arrange mode with new levels. Not sure if you want to treat the port as separate, or if you want to keep a board for the arrange mode, etc.
Despatche - 166,760 - Round 10 - ShmupMAME v3.0b
I'd say I'm a fan of Bosconian... not very good at it though! Never really understood why people always look at this and Gaplus like they're "lesser" than Galaga. Never really understood why people see Rally-X as a "poor man's Pac-Man" either.
You guys should try Sinistar if you haven't, I'm sure that game was directly inspired by Bosconian. I also recommend ZugyA (specifically ZugyA DX), it's like Bosconian meets Chourensha 68K or something. But the Bosconian remake you're looking for is
Kobo Deluxe.