I was just going to say almost the same as many other people:
Celtic Manor - just returned as we have a match every year - haven't yet played 2010 (will be next year) but the other 2 courses are not brilliant and 2010 doesn't look too appealing (albeit better than the other two), especially at £150 a round! I would suggest Southerndown - cracking course at about £40. I had a look at P&K but haven't played it - half of the course did not look that great but the half in the dunes looked superb. If you want a modern design, I was impressed by Machynys Penninsula - a great back 9 on the estuary. Pennard is one of the most spectacular settings I have seen for a golf course and I would love to play again, although it is very natural, perhaps too so in places!
I would ditch Wentworth in favour of the Berkshire or Hankley Common - both great experiences are much better than Wentworth at circa £100 for the day
Other recomendations in the area - I wouldn't pay summer prices for St George's Hill - nice course but no better, possible not as good as West Hill and Worplesdon - not yet played Woking but suspect the same. Would also prefer New Zealand. I have still booked another day at St George's Hill for 16 April next year, but at £81 for 36 holes, bacon & coffee, soup and sandwich - wouldn't pay much more but it is a very nice experience and you are well looked after.
If you want a bit of parkland with a heathland feel, try Bearwood Lakes - my course and I love it, especially in the summer.
Other cheaper options: Hindhead, Noth Hants, Liphook, Blackmoor