I'm also fan of Markevitch' Tchaikovsky - for the reasons you stated - but only know his London cycle.
Didn't know of this BPO recording - thanks for posting!
It's a very nice recording, can't say I prefer it to Mravinsky as Andre but still definitely worth hearing. I find it quite interesting also as a tribute to flexibility of early 50s Berlin Philharmonic. It's nearly contemporary recording with Furtwangler's Pathetique with the same orchestra from two years earlier and it's great to hear how well they cope with two interpretations which are polar opposites in terms of both vision and style.
Prompted by the Dvorak thread I'm listening to my favorite recording of Dvorak's 3rd. The lushness and sweep of Chung and the VPO in endlessly melodic piece as the 3rd is almost intoxicating. Shame that chances of hearing it live (outside Czech Republic) are pretty slim I guess.