preamp and amp to integrated

1991 system, luxman tp 117 preamp, luxman dc 117 multi disc cd player, adcom 535 II amp, powering kef bookshelf speakers in small family room, and 3 rooms with small luxman inwall speakers. Rarely play more than 2 sets of speakers. Preamp has died.  Found a very good deal on a pristine Arcam fmj a18, to replace preamp and amp. The old adcom is 60 watt/channel.  The arcam is 50 watt perchannel.  Will this be enough for this little system?  Thanks.