Hi, I have just DIY fitted a Beam system. I also looked at the cyclovac and was impressed by them also, and the lads in Dungravan seem very nice to deal with. For my Beam system, I dealt with Joe Sharpey in Bantry and he couldn't have been more helpful with advice on how to do the job myself. In the end I felt the Beam had the edge, but no real justification in saying that! One thing I liked about the beam was that there was no filter to replace. If you have a very big house, some of the cyclovacs seem to be more powerful than the largest Beam.
Also got a quote from vacuflo, but wasn't overly impressed, but again no real concrete reason for saying this!
If you are interested in the hose which retracts into the wall I know that cyclovac will fit this for you also, although they don't seem to push this option. Beam do not use the system. While this system seems great at first look, I am sceptical enough about it. Firstly, in a lot of cases you will need to extend the length of pipework in your system to allow space for the retractable hose to fit into. Also I didn't like the idea of pulling the hose out of the dirty central vacuum pipe. Just have a feeling that after a few years hose would start to get fairly grubby.