Digital BW, The Print

I am really struggling to find a decent & reasonably priced double 
sided matt paper for use with my Ultratones.
I am after A3+ size as they will be folded, sewn and bookbound in 
half size.
So far I only have Bockingford, which sounds awful for pigment inks 
(and very highly textured which is also not so idilic...) but 
feedback appreciated.
OR Photorag Duo - read: horribly expensive.

Are there any others?
Usual caveat, I am UK based so many of your wonderful choices are not 
available over here, sob.

Struggling.

Steve.