I work (well for the next few days at least) for a Fireplace/stove shop.
Our best sellers, and ones that I would recommend are either Morso or (Chesneys – we have had a few quality issues but mainly excellent), or the Euroheat Harmony if you have deep pockets (around about £2k for the 33 model). As said about, many stove now are Defra approved to burn wood in a smoke controlled zone.
Make sure you get a reputable fitter or shop to do the work – there are SO MANY cowboys around, even HETAS approved ones, if you fancy a bit of light reading, get your hands on Document J of the building regs. It would be advisable to check whether the installation work includes back-filling of the chimney with leca or vermiculite to further insulate the flue liner, and also if the liner is properly fixed at the top with a new pot fitted rather than just using a hanger to support the liner in an existing pot. These are signs of a good installer if they will be done.
Edited for spelling and grammer.