I have the Braun 9585 / 760cc. I've tried numerous electric razors, and this is the first one that I've liked using. Rotary razors make my face feel like it's on fire (yes, even after I've used one for years... always hated it), and cheaper foil razors were just as bad. This one, however, was a game changer.

Works beautifully. I can shave daily, if I want to, or I can wait a couple of weeks between shaves.... doesn't matter, it can handle it. I always put it in its base to clean after every shave, unless I'm traveling, when it might go a week or two between thorough cleanings (feels like performance starts to degrade after about a week).
As for supply consumption... I go through one cleaning cartridge every 3 months or so. I'd estimate that I use around one foil/block per year. Supplies therefore don't cost me very much. Yeah, the initial purchase price is high, but it is definitely worth it, for me.