Hi,
Personally, if you're only ever going to do this for those 3 tapes, I'd go with your original idea of playing from your VCR to a borrowed DVD recorder.
Obviously the possible risk to your tapes comes from the quality (and cleanliness) of your VCR mechanism. As gizz says, the 'safest' thing would be to play the tapes back on the same machine they were recorded on. But Panasonic have arguably always made the best quality, most reliable (and therefore kindest to tapes!) consumer VCRs available, so if your Panny VCR was originally £500, and you're happy it's never chewed a tape (and is never likely to), then I reckon you'd struggle to better that. If the VCR has got S-video output, you'd also want to consider whether that would give better video quality to the DVD recorder than a standard composite connection. (And I personally don't understand whether it would or not, if the tapes are only VHS rather than S-VHS??? Someone else will know!!)
Yes, there is a wide (well, certainly noticeable!) range of video quality you can get from a DVD recorder. You might want to check the DVD Recorder forum on here for more advice, but when I got my Toshiba RDXS34, 18 months ago, the serious contenders were Panasonic again, Toshiba, Pioneer, and Sony. JVC were also recommended for dubbing from VHS, and LG and Samsung were also considered to be worth looking at.
For best quality, you only want to put 1 hour of video onto each DVD-R. (Which would probably equate to 'HQ' on the recorder, or about 8 Mbps video, with the audio either being uncompressed at 1410 kbps CD quality or with minimal compression at about 384 kbps which is twice as 'good' as MP3.) Assuming your tapes are longer than 1 hour, it's a lot easier if you know someone who's got a combined DVD / hard disk recorder. That way you can transfer the whole tape onto the hard disk in one go, and then break it up into chunks of 1 hour or less (and add chapter marks and menu thumbnails etc) before burning onto DVD. It also makes it easier to produce 2 or 3 identical DVDs at the same time, rather than playing the tapes again. (Although you could obviously copy a master DVD on your PC anyway.)
But before you think archiving videos to DVD will be the end of all your worries, I did have a waffle about the lifespan of recorded DVDs and archiving to them in
this thread a few weeks ago. Ultimately DVDs are a distribution format rather than an archive medium, - but they can be used for archiving (as I do) if you're aware of the potential pitfalls and keep regular backups!