A rebuilt with Curcio power supply mod-Dynaco ST-70 with very good tubes might be the ticket and surprise you too.
I replaced my Threshold S/300 with the Dynaco which is more musical and doesnt have the Threshold midrange dryness.
The Dynaco doesnt have the power of the Threshold or the bass control,but believe it or not, the Dynaco is not that far behind (with Curcio ps mod and vg NOS tubes) which adds a much improved midrange tubes are known for.
A few for sale here within your budget.
I replaced my Threshold S/300 with the Dynaco which is more musical and doesnt have the Threshold midrange dryness.
The Dynaco doesnt have the power of the Threshold or the bass control,but believe it or not, the Dynaco is not that far behind (with Curcio ps mod and vg NOS tubes) which adds a much improved midrange tubes are known for.
A few for sale here within your budget.