Mountain (or) Lion

[acme.mail.order]

With Mountain Lion just around the corner I'm trying to decide which way to go.

I'm presently running Snow Leopard Server on the desktop. My laptop is *just* out of the zone for ML.

Should I: (Desktop will get Server version in any case)

a) Put Lion on both machines.

b) Put ML on the Desktop, Lion on the laptop.

c) Get ML for both as it will probably work.

Opinions?