I am looking to add an ADSL Router to my system for under £100 can anybody suggest a good quality, fast, reliable unit with built in firewall?

Hi and welcome to D-A-L

are you looking for wireless or just a router?

you should be able to get a wireless modem/router for less than £100

have a look here for starters

http://www.amazon.co.uk/gp/product/B...lance&n=560798

if you don't wireless you'd get something similar a bit cheaper

I charge less than £100 to supply AND INSTALL a broadband router - that budget would allow you to almost have your pick of any that are available. Do you have any existing hardware that you would want it to be compatible with, e.g. a wireless network card built into a laptop or a PCI network card fitted inside a PC? If you do want to go wireless, what kind of range are you looking for? Is it just for one PC or are you looking to link multiple PCs in a fast networked environment at the same time?

Lots of questions to ask in order to advise you of the best product because there are so many available!