I used Airways at Exeter last summer, and they were really good. Ex-mil instructors, no bullsh*t, and they were very focussed on what you needed to do with prior experience in mind. Costs were reasonable in comparison to anywhere else, and if you need exact numbers, give Brian a call, and he'll run you through some numbers.
Wouldn't hesitate to recommend them, as long as they don't get too busy for me to fit in my revalidation!!