Thanks for your quick reply.

My video clip was recorded in 1080i (Sony HDR-HC3E) which I assume is interlaced.

Cineform Aspect HD
After further investigation the problem looks very similar to that on the cineform website (but not as bad)
http://www.cineform.com/products/Son.../CineFrame.htm

Should I ultimately re-capture my footage using Apsect HD.

De-interlace the footage.
How do you de-interlace the footage?

Export Video
How does the export feature in Adobe compare with other 3rd parties. What would you recommend?

I plan to watch my HDVs through a Media Centre PC connected to a LCD TV.

Many thanks for looking.