Cheers guys, went for the Vitrex in Topps, new blade cut my 100mm glass tiles as good as I need, will watch how the blade performs and upgrade if needed but initially very happy, also got £10 off with trade card:hurray:. Very quiet and smooth running, minimal splashing, solid feel to it. Only downside is the bore size is only 18mm so need a collar for non-Vitrex blades.
ps Dave at Tradetiler was very helpful when I called for advice, I would endorse others recommendations even though I didn't buy from him this time.