You won't go wrong with whatever you do. My personal favorite if I'm staying seven nights is to rent a condo from a timeshare owner.
We have NEVER attended a timeshare prensentation, but have rented timeshare rental condos from owners for Orlando visits eight different times. When we check in, we just ask not to be called to attend a presentation and ask if they can accomodate this or should I disconnect my phone. We also don't pick up the welcome packages, as what this is, is an opportunity to be invited to attend a timeshare prensentation. They always acommodate us. Timeshare owner rentals are typically for a seven day period (Friday to Friday, Saturday to Saturday, or Sunday to Sunday). I love the space, ammenities, and resort feel that these timeshare resorts have. I belong to a timeshare users group (even though I'm not a timeshare owner -- TUG2.net) that gives me very detailed reviews and member ratings for all of the timeshare resorts in the area. I consider any of the resorts rated 7.5 or higher on this site very reasonable ones for me to look at (And there are tons of great ones). We go to Orlando a lot too, and I find it quite fun to try different places. For quality of lodging and value, the Orlando area can't be beat. There are two websites I typically find my rentals from. I rent from owners I find on Redweek.com ($15 annual fee to rent from here and you only have to join if you find a rental you want. You can sign in as a guest to see options) or TUG2.net (Classified ads section -- no fee to access this.) On TUG2.net there is an annual fee of $15 I believe to join to see all the detailed ratings and reviews of all the timeshare resorts Disney area and elsewhere.
Cypress Pointe, Cypress Pointe Grand Villlas, and the Sheraton Vistana Resort are resorts that we've stayed at most recently though owner rentals that I see come up a lot that I think are great options. Cypress Point and Cypress Point Grandvillas is where I go if I need three bedrooms because they have tons of these. Most timeshare resorts have lots of two bedroom units -- sleeping up to eight, but not that many three bedrooms.
With 22 trips to the area, we've done the rental house route, the onsite disney route (deluxe, moderate, and camping), the offsite hotel route, and the timeshare rental condo route (eight times with this option). There are many factors that might influence what you choose. My personal favorite, though for a week long stay is the timeshare rental condo route -- more of a resort feel than a house to me and I like that, with the timeshare resorts rentals you aren't subject to individual decorating tastes like you are with other owner condo rentals -- all units have the same decor and selections are made to appeal to the general population -- our teens don't want the Disney Princess room, Pirate themed room, etc., and of course the amenities (tennis , pool, game room, often much more than that, full kitchen, washer/dryer, nice balcony, bath, space) are wonderful.