Give the Sony MDR Z1R a try; they offer a same signature sound compared to the R10 and incorporate a more modern approach.

Can I maybe ask you if you heard prosperity the R10?I had and owned the Z1r,the R10 is miles beyond in pure sound quality

True legend but worth to mention that channel imbalance in some copies. Multimeter + sound (noise) meter would be welcome at buying them I had Z1R at home and IMVHO they are beyond MDR-CD3000 in pure sound quality. Completely different sound signature (fun vs refinement). Sorry but I didn't liked Z1R. Much preffer cheaper Z7m2 with EQ.

How would this compare to a Caldera?

Back around 2007 I got hooked on the SONY MDR-D77 egg shaped headphone which I used for recording. It was amazing. The model had been discontinued by the time I discovered it. My set broke and the repair shop I took it to screwed it up. I searched and got another one on eBay, paying a big premium because apparently I wasn’t the only one who thought it was great. That set eventually broke too. The R10 looks similar in some respects, I wonder if it’s an evolution of the D77. Nice review.