16X9 playback fr a SD DVD player?

Does a stand-alone SD DVD recorder exist that has an HD SDI, HDMI, HDV-firewire or HD-firewire input?

If yes, and I'm dubbing from the F70 XDCAM HD deck to that burner (and I know I�d need a converter box if I�m going to HDMI or firewire), will it preserve the 16X9 aspect ratio on the DVD, and fill the screen (no letter box whatsoever)?

Put differently, If I'm dubbing from an F70 XDCAM HD deck to a stand-alone DVD burner, is there any possible way to preserve the 16X9 aspect ratio on the DVD?

With the F70, if I dub to a standalone DVD composite-out to composite-in, it dubs 4X3 (specifically 4X3 letterboxed top and bottom). If I dub firewire out to firewire in, it dubs the same, 4X3 (the firewire-out on the F70 is a DVCAM-out, it is not HD).

You can add a firewire plug-in to the F70 that enables HDV-out. So if I used that output or the HD SDI output, and went through a box that could change the output to HDV, HD firewire or HDMI, is there any possible way to preserve the 16X9 aspect ratio filling an HD screen during playback?

Any input would be greatly appreciated.