I would whip out my wallet and buy, without a nanosecond's pause for thought:
SPAD XII - some great schemes, many ace pilots, cannon armament
Morane L - bags of significant history, famous pilots
Oeffag Mickl H - unique and fab looking machine
FWIW I've been gathering a few bits and might even try to scratch the last two, but the SPAD XII has subtle lines I couldn't do justice to, and only superficially resembles the VII or XIII so I don't think a conversion is on.
I'd be very interested in, and be likely to buy:
SPAD XIII
Lohner flying boat, especially L47
SSW D.IV
Oeffag 153
Sorry for repeating wishes from elsewhere, but there you go, no point in keeping quiet if someone asks! Great to know that Copper State are listening.
Cheers
Mark