Well there is the close to $1000 DVCPRO one for the HVX/HPX170 but there is the older SD one for around $500-$700. I have never used one but I hear they are pretty cool. Might be a good investment if you shoot a lot. I should have gotten one a while ago and I hope to eventually get one because I have had my DVX since January and I have spent about $600 in tapes so far... Plus once $250 for head cleaning.