I have bluefin on my ed30. You will definitely notice the power/torque increase. low to mid range, the car just pulls so strongly, imagine driving at one gear lower and you'll get the rough idea. However, the car feels less impressive past 5K rpm. Of course it's still much better than stock, but compared to the mid range shove, i feel the top end can do with more 'fizz.'
I have heard that GIAC from regal provide a more aggressive map aiming more at huge power than drivability like the Bluefin.
I'd say get one that closer to you so you get support from new maps etc if needed.
I wanted APR simply because you can switch maps using the cruise control stalk, but Manchester in 140 miles from me, so bit too far. I'd go with APR if i remapped again, because they do rolling road remaps, unlike generic bluefin maps.
So far only cars that have been faster are a M3 (only after naughty speeds) and an EVO5 that looked heavily modified, i kept up with an EVO 8 FQ300. Motorway by the way, not on twisties lol