I'm just starting out using the TM700 as a B camera and at $750, I'm enjoying how well it matches with the EX1R. I'll be doing some studio work this week but this is a quick comparison I did with B&W polarizers. I'm a fan of polarizers and how it affects not only the sky color but also the image. YMMV.

Sony EX1R vs Panasonic TM700 Polarizer Test on Vimeo