if you have a VMNG300 from a previous install, ask the engineer if he can activate that on the 100mbit tier.
the superhub is okay, personally speaking. works fine. just in my case is totally impractical. if at any point they tell you the old VMNG300 wont work on 100mbit, dont believe them
from reading these forums it seems to depend on the engineer as to whether they will activate it on the 100mbit .... mine said he could do that and even called his tech desk to clarify that it would work (they said yes). but never take anyones word for it as gospel; always ask them your self.