Any reason you aren't using the Sony AVC/MVC codec? There are Blu-ray templates predefined. You could make a 720-60p custom template. I use it all the time.
There is no way to use MainConcept AVC rendered video (from Vegas) without recompressing in DVD Architect, except you'd do much fiddling with additional apps after. So if you want to use AVC in DVD Architect without recompression it's highly recommended to use Sony AVC as render format in Vegas.
John, et.al. I want to use MC to be able to get higher bit rates. My cam shoots 24 Mbps and the sony AVC encoder won't encode over 22. If you set it over 22 DVDA will recompress even though sony's own documentation says you can encode to 40 without recompression.
Please post your custom template to a site such as dropbox.com as I did in this thread and this one. No use all of us struggling with it if you already have the settings worked out.
I'm a bit puzzled by the custom settings thing. I just render one of the standard templates, but untick the 'include audio' tab. Or, use tsMuxer to unmux if I forget.
My Canon HF M41 records at 24 Mbps too. I have the Sony AVC encoder render my footage at 22 Mbps (actually 21.999) which isn't recompressed by DVDA.The Sony encoder uses a variable bitrate and in the rendered footage the bitrate appears to sway quite a bit, sometimes well over 30 Mbps.
I wonder if you'll ever see a PQ difference with the MC AVC encoder at the bitrates you mention.