Orange are probably not the best example of reasonable pricing.
From what I can see above the 5 frame price seems to be less then the others quoted, even with Kashima.
SB66 = £2000
Tracer 275 = £1800
Turner Burner = £1895
SC Bronson alu = £2020
Nicolai ION 16 (no shock = £1995
Don't let that get in the way of the often mentioned STW 'fact' that the 5 is way over priced.