Okay you got me started....
Centurion is the way forward. The club list for Centurion is long, its not really published as such as the club people didn't really want it advertised as such - just call AmEx if you have a Centurion Card and they will assist.
Both £650, but Centurion does an awful lot more:
- 2 Priority Passes
- Comprehensive Travel Insurance for main cardholder and their partner and kids under 21 in Full Time Education, and then also for any of the 5 supplementary card holders including North America Car Hire insurance
- Starwood Platinum Status
- Hilton HHonors Gold status
- Access to the VS Clubhouses

, Eurostar, British Midland, Continental, Northwest lounges
- Its a charge card, so you can use it pay for things and you get cover on your purchases
- Memebership reward points which can be used for a variety of purposes, includign transfer to Virgin Flying Club.
There's more too, but as an overview - Qu is a conciergef acility, TENuk (
http://www.tenuk.com) offer a similar service. Thing to bear in mind is that they may be able to do as they say but at what cost - tickets for a sold out event but at what cost?
Centurion has an awesome lifestyle department that get allocation for top events up front. And yes sometimes there is a little mark-up but then I know I'm getting top seats. Row 5 at Beyonce for £10/ticket markup. There is then the regular magazines too, always look nice on my coffee table and there are some truly amazing events - some are expensive but unique, others are quite reasonably priced. To give you some examples, this quarters event magazine has a day out to visit the Bentley Factory, Lunch and then a test drive in the new GT - cost 5,000 MR points which is absolutely nothing, at the other end of the scale, there is a full weekend visit to the Emmy's in LA, with dinner at a celebs house and aftershow party tickets. Finally, in the recent Centurion magazine there was an offer to test drive the new A8, I have a £65k Audi A8 being delivered on Monday for a weeks test drive - cost to me? Nothing.
I've had Centurion for nearly 3 years now, its £650 yes, which is over £50/month but then its worth every penny several times over. With my healthy spend, I also get at least one Upper Class flight a year out of it in points alone. And as for scoring serious brownie points with the girls in the office!

If you want further clarification, please let me know or take a look on FlyerTalk in the AmEx forum - I have hundreds of posts about Centurion there.
Thanks,
Richard