A newer Accuphase ??
Butler makes a 250wpc 2 ch amp too.
ATI makes a lot of amps for a lot of electronics makers. Often affordable, hefty, robust power supplies, and very well designed. Their newer line up has some truly balanced models.
The other thought here is, as it seems cost is an issue the above still work, but why not simply look for a replacement amp for the rig the Accuphase was/is in and leve it in the HT rig from now on instead of trying to replace it?
And/or just get another Accuphase for the other rig now missing it's Accuphase?
of course that'll work... but if something different and subjectively better is desired and can be acquired, I'd urge you to check out some hybrids or maybe even a pair of Halo mono blocks. I spoke with a guy yesterday that said they were warm-ish amps once fully run in... around 500-600 hrs. otherwise, I've found amps at & over $6K are where the better amps begin.... usually.
Good luck.