Yeah, the Neo Geo probably could've handled KOFXI with some background, special effect, and GUI compromises. But in case you weren't aware, SVC Chaos, Samurai Spirits 0, and KOF03 were dumped and could be easily found online the first week of their releases (the first day even). SNK tested out KOF Neowave to make sure the then-promising Atomiswave platform was viable and made the only realistic business decision available at the time.
Anyway, it's interesting nobody has mentioned KOF98 Ultimate Match here yet. Although it's not a Neo Geo title (original UM was on Type X, UM Hero was on PGM2, and UM Final Edition was on NESiCA), it certainly maintains the same spirit and has the same high points as KOF98. I'm not too sure how it's faring now compared to the original KOF98; Krauser dominated KOF98UM tourneys, nobody seems to care about the PGM2 version, and NESiCA is apparently rebalanced but has little info because the platform can only be run in Japan (where there don't seem to be any religious English-speaking KOF fans). Anyone here have more info on the later KOF98UM revisions?
I respect KOF98 as the apparent epitome of SNK tourney fighters but I'm in the simplicity camp of KOF94 and 95 myself.