Don't think you can have the sides done as the factory tint is pretty close to the UK limit. I had dark smoke (one below limo) on my side quarters and the rear window, it cost about £80. The guys I used refused to do the sides, but the cost including the sides would have been £100.
Pic's in the build thread in my signature.
I used the same guys as 14N (middle link in the post above), couldn't fault them, they are based in Dudley (West Midlands). When I was looking the general costs for all windows (including sides) seemed to be £150-£180.