to be honest, i think fan pattern rackets are few and far between (although I'm sure there are some places....).
as such, i wouldn't buy a machine based on that unless you KNOW you are gonna be stringing them alot.
nonetheless, I'd still get swivel bases. but there is something to be said for glide bar clamps!!!
Microgel Radical MP (5), Cheap 16g Gut/ RedDevil 1.19 - 56/54# (among other setups)