Just wanting some insight on digital cameras. I currently shoot medium format (portrait/close-up/still life), but I'm looking to buy a digital cam for mostly portraiture (indoor and outdoor). Including a lens or two (and an off-camera strobe), I'd like to spend in the $4,000 range. I definitely want to take professional quality portraits...and don't want something that's going to have delays when shooting. Storage space and resolution are very important, as well. Does anyone out there have any favorite digital cameras that they've used that they could tell me about? Pros, cons, tips for shopping, etc. Thanks!