Cheers for the suggestion. I'm finding it difficult to zone in on the touch screen only models though. Lots of these review sites have search filters, but very few have a touch screen option.
I've just this minute placed an order with Dell. Seems their Inspiron 15R (5521) seems to tick just about all the boxes. The 15Z was let down by it's dull screen but the reviews for the 15R seem to indicate a brighter screen. When SSD's come down in price I'll probably swap out the HDD for one of those.
Thanks for your help - much appreciated!