You should have a Xenon in that collection 100%. I think Xenon has the best background sounds (and voice) of any early SS pin. Combine that with beautiful artwork, good gameplay and a price that’s 1/2 of Fathom and you have a package that’s hard to resist.
Xenon is currently the only early SS in my collection because it embodies every thing I loved about arcades in the early 80s.