I highly recommend Miyata 610 or 1000 (as well as early Koga-Miyata world traveller). Those 2 models have alot of similarities to the Centurion Pro Tour framset of yours. They are extremely well made and have similar geometry with lots of braze ons. The Specialized Expedition is also very similar (built by Miyata I believe). They seem to pop up for sale often and for prices in your range.