We've just had a new one built by a local chap who is a carpenter. It's lovely. Everything is solid wood, no MDF, no chipboard. just a very simple wooden framework with hand built wooden doors and a single deep, proper wooden drawer for utensils and so on.
It was very good value and cost less than any of the B&Q designs I saw - and B&Q were completely unable to make their units fit the room. Their design service was useless. I mean really, really useless - they were just trying to cram extra units into places where they would look utterly stupid, so I would spend more.
We only have a very small, awkwardly shaped kitchen with an alcove, but I really thought they would want to be clever and make their units fit. Nope. It was all 'well you'll have to have a standard one there with a load of filler pieces and just lose all the space behind it, best we can do'. 
I am ranting but getting this guy in was the best decision ever. It was just over £700 and done within 3 days.
We have a 'budget' worktop that looks very posh - sparkly white gloss with a square edge, painted cupboards, no wall units, a 'vintage' (but new) astracast sink which is orange
and cost me £21. Posh Franke tap though 
I put up the shelves myself.
If you have the choice then go with solid wood every time.