Joel, the Valley looks very nice and reasonably well supported by trains. It is also easy to access from Bergerac airport. We like to look for circuits that people can ride over 5 to 7 days (200 to 300 kms) and we would be interested in knowing where a good circuit would go. Any suggestions?
We have used a variety of bikes all over Europe area and we are not not fully convinced that expensive bikes are needed to have a great holiday. Yes, it is best if they don't break down and it is nice if they are not so heavy that you can't pull them over a fence or two but expensive bikes can become a liability (stolen, damaged, scratched), still if it works for you and your customers that is great.
If your rental facilty can reach our Bordeaux route then send us your website link and we can add it too our webpage.