Michael, I render using the MXF HD EX 1920×1080-60i template from Vegas as I find that the quality loss using this is so small that I don’t notice it. Bring that into Premiere and render away 🙂
FYI, I find that it’s a great alternative to the DVCPRO HD 1080i60 format and an MXF file is a LOT smaller than the comparable DVCPRO HD file.