I'm not yet, but I may be soon, and I'm pretty sure there are some others around here somewhere who are already doing it and have been for some time. From what I understand, 45MHz is sufficient for passing 720p and 1080i HD signals without degradation. Here's an excerpt from RAF's 950 review, including some info from an old Outlaw newsletter on the subject.

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gonk -- 950 Review | LFM-1 Review | Pre/Pro Comparison Chart | Saloon Links