I'm also a big fan of British speakers. I've had a number of British speakers, and although I like the missions, I would only use them in a home theatre system. Comparably sized speakers I have had and liked are Kef 103.2, Wharfedale 507.2, Celestion Ditton 15, Mordaunt-Short Pageant, Rega 2.0, Tannoy Stratford, and Tannoy T125.
I've had the following Missions; 220i, 707, 710, 761i, and M74. They sound good, but not as good as I found the ones above sound. My favourite of the Missions I owned were the 707s. I had trouble selling all of them around here and ended up getting less than I expected. Maybe because they were quite common around here. These all cost comparable between $20 and $150. I was surprised when I paid $80 for the M74 towers and sold them for $160.