Aha. I've got posh friends like this.
Definitely Smythson stationery with their initials. Vital for all of the thank you letters and suitably posh.
Things I've bought my posh friends are: Fortnum & Mason hampers, stuff from Molton Brown, garden stuff from crocus.co.uk (really nice antique colanders on there at the moment, v.nigella but unique and good for herb gardens), champagne of course, small things from Tiffany, Jo Malone smellies. I'll try to remember some more.