Le Meridien is a brand new hotel (well, it opened last year) and has a Club Lounge (that wasn't open when I stayed so they did booze and snacks in the bar downstairs).

I can recommend Le Meridien because it's new and they'll upgrade you to a suite if you're Platinum. Location is still walking distance into the centre.

Can't comment on the Sheraton but you'll probably hear that it's an old hotel in a more central location.