If you like what 240 new caps did, try replacing the handful (probably 4) of 20 year old diodes with newer faster higher quality. I lean more McCormack myself, but better diodes improves everything.
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If you have a choice, higher temp caps last longer.
But yeah, that amp may sound better than it did originally. Electrolytic caps are so much better, lower inductance than they used to be.
Panasonic makes great ranges of low inductance, low ESR caps. FM among them. I'm sure others do too, it's been a long time since I recapped an amp, an old Yamaha P2050. :)