I am with virgin and have a wireless "Netgear" router i bought works fine not had any problems and you get a disc with how to set it up its so simple.
virgin do supply routers though and if you do have problems with one you bought elsewhere they will not give you tec help only the one got from them has support.
here is a link to virgin media shop wireless routers
http://shopping.virginmedia.com/ctl/...&fromform=true