Ah... I'm more of a console/emulation guy, so I don't know about JAMMA board prices, but I'll toss a few of my faves out there.
Ikaruga (Arc, DC) --- obviously for a RS fan this is a good one.
GigaWing 1 and/or 2 (Arc, DC)
Mars Matrix (Arc/DC)
DoDonPachi (Arc)
RayForce/Storm/Crisis (Arc) --- also known as Gunlock or the Layer Section series.
Gunbird 1 and 2 (Arc/DC)
Salamander 2 (Arc)
1941 or 19XX (Arc)
Kyokugu (??) Tiger 2 (Arc) --- Twin Cobra 2
Twin Eagle 2 (Arc)
If you wanted to go pre-90's or console there are jillions of other cool shooters of course, Gradius V, Einhander, the rest of the 1942 series, Thunderforce...