Best kitchen fitters/builders?

Hi, I'm looking to get the kitchen in our home completely gutted out and redone (Carpet lifted and replaced with a lino, a plastic panelling taken off the walls and painted, then some new shelves, drawers, possibly a new sink, the usual) and I'm just hoping someone could point me in the right direction of who is good to use without it costing the world. We're thinking maybe b&q but if there are any others that are decent that will help design and fit it, without stupid hidden costs it would be great. We're not wanting it to look cheap but we're not looking for top of the range gear either.