I bought a bell tent from canvastentshop.co.uk a couple of years back. It's a great bit of kit with loads of room. I added the frontier stove with the flashing too. Would definitely recommend both. Although at around 28kg for the 4m it's not a backpacking tent!
One possible mony saving tip. Instead of buying a bespoke spark arrestor I made one out of a bird peanut feeder, a small metal dog bowl and a couple of tent pegs. Total cost, about a fiver.