HDV to Digibeta and Old Avids

I'm pretty new to Final Cut Pro. We work on old Avid Meridien Media Composers and they can't handle the flood of new file formats that are coming in. The current issue is that we have a ton of HDV 1080i60 files for a documentary that we want to cut on our Avids. We don't have the tapes, just files that were digitized using FCP. We started by making 60 min. HDV sequences in FCP and dumping them via firewire to DV. Then bumping the DV to Digibeta and then bringing them into the Avids. But as you probably have guessed already, it looks lousy. The DV doesn't handle the HDV resolution well and we're getting all kinds of moire artifacting.
So, using Compressor, I started trying to transcode the HDV files to a Quicktime SD format and nothing looked good, I kept getting the moire effect. Finally I got decent results transcoding to Avid 1.1x SD. So now all I can think of doing is transcoding all the files, import them into the Avid, output to Digibeta, bring them back in at 15:1 so I can cut the doc, then uprez from the digibetas and then output back to digibeta. Lost yet? This just seems ass backwards and tremendously time consuming.
An alternative is to cut them on the FCP system (which I'm really unfamiliar with!) staying in HDV and then output straight to Digibeta via the Blackmagic DeckLink HD Extreme card. Which gets me to my long, long winded question. Can I go straight to Digibeta from a HDV sequence in FCP, or am I going to get the same moire effect? THANKS ALL!