A few more things that will hopefully help with your decision.

The Hayward Super pump uses a standard efficiency motor and has a lower max head while the Super II is a high efficiency motor and has a much higher max head. You will probably save quite a bit on electricity over the life of the pump going with the Super II over the Super.

Also, Sta-Rite makes very good pumps as well and if it means less plumbing changes, then thats what I would go with.