Realistically that is.
What speed would you like to have, that you could realistically make use of, say, over next year? (so don't put down something like 10Gbps up/down, cause I really doubt anyone could fully make use of that)

Note, referring to achievable speeds, not rated speeds (that is, assume a 8Mbps actually does deliver 1MB/sec).

I'd probably be plenty happy with a 25Mbps down 15Mbps up.  Realistically I doubt I could use any more than that in the near future.