Top three 4-track capable deck almost at the pro level would be:
Technics RS-1500 series
Otari MX-5050 B-II
Revox B-77
and a bonus
Pioneer RT-1020L
These you would have to hunt locally for....they usually go over your budget online. Otari, pops up often locally and is a beast. I've personally owned all four of these models and a few others. Wondering why you are set on the 4-track format when 2-track is clearly superior.
Technics RS-1500 series
Otari MX-5050 B-II
Revox B-77
and a bonus
Pioneer RT-1020L
These you would have to hunt locally for....they usually go over your budget online. Otari, pops up often locally and is a beast. I've personally owned all four of these models and a few others. Wondering why you are set on the 4-track format when 2-track is clearly superior.