Windows 7 - Suggestions on DVD authoring SW?

I've been recording some older TV programs with Media Centre, and I'd like to be able to archive them onto DVDs, and edit the commercials out in the meantime. The problem is, it seems to be a many step process, with software that doesn't seem to be compatible with each other's formats.

Right now, I use Windows to covert from .wtv to DVR-MS, then Format Factory to get it into a workable MPEG format, so that I can edit the commercial breaks out. I found Avidemux to be a pretty decent freeware editor, but I can't get the output set so that any DVD burning software I use can read the files without errors, or just looking horrible.

I've tried DVD Flick and it's okay, but it seems to just quit working every now and then, or I get a load violation about "Not being licensed..." Uh... it's freeware? Right now, I'm using a bundled Power DVD version I got with my burner, but it's editing capabilities are limited and hard to use. It's also murderously slow, even on my quad core.

Is there anything out there that will let me edit and burn the DVD without transcoding several times, with several different programs? I'm sure that's where the quality loss is coming from. I've given up on freeware, so unless someone has had good success with something, is there a paid version (reasonably priced) that anybody knows about?

Thanks.