Hi
I take it you are in the land of NTSC!
Suck it in as Canopus HQ 1440/1080.
Render out the DVD MPEG 2 file with Procoder Epress at the high settings (8-9 mbps CBR) and then render out the ac3 audio tracks. The ones I have done look very good from my PAL setup.
Get DVDLAB Pro to author the DVD.
Make up your DVD graphics in Photoshop or better still Illustrator.
DVD Lab Pro is very powerful and does not hold you hand like most other authoring programs do and it's cheap. You will be amazed at what it can do once you dig into it.
My last glass pressed production I even burnt with it's built in burning program and there is an option to check the master disk as well once it's burnt.
About the only thing it cannot do is output to DLT tape but you don't really need to now days anyhow.
Swift disk does Blu-rays now but the best thing about it is it can burn to multiply burners at the same time plus many other things.
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The Print to DVD that comes with EDIUS is only good for quick day DVD's...you will laugh at how quick it is if you have a QUAD CPU setup.
Use good disks (Taiyo Yudens ) and don't burn any faster than 4 or 6 speed.
Good luck.