Pepler-
Are you SURE??? Remember, at 85db/1W (8ohm) a "high powered" 30W SE will give a nominal <100db spl at PEAK level into a pure RESISTIVE load, before clipping. Real life speakers are far from being purely resistive (their impedance oscillates happily with frequency) making things worse.
As Marco above, I would strongly advise you either look into high powered amps (like the Wavacs or Lamms or KRs) OR forgo the Proacs.
My 2.5s are db rated in the mid 80s but are relatively easy to drive
Are you SURE??? Remember, at 85db/1W (8ohm) a "high powered" 30W SE will give a nominal <100db spl at PEAK level into a pure RESISTIVE load, before clipping. Real life speakers are far from being purely resistive (their impedance oscillates happily with frequency) making things worse.
As Marco above, I would strongly advise you either look into high powered amps (like the Wavacs or Lamms or KRs) OR forgo the Proacs.