http://flyertalk.com/forum/showpost....08&postcount=2
my last compilation, ive done quite a bit of research, and have used amex plat and quintessentially in the past.
theres been plenty of discussion in amex and other credit cards forums.
quintessentially is solid for people earning in GBP, unless you are more in the market for a PA, or something else that they are not designed to cater to, at the entry level.