We were at Silver Lakes several years back. It's located just around a long block from Animal Kingdom - very convenient. We liked it okay. The older units are in 3-story walk-up buildings, closest to the main pool area, very spacious and they have a rather dated decor with too many mirrors. The newer buildings are taller w/elevators but the rooms are smaller and you could end up in a room that overlooks the busy side road (Sherberth) that everyone uses as a back road to Disney. This place has a really large game room for the kids and a huge fitness center for the adults. The pools are good too.
We've been to Wyndham Cypress Palms 3 times in the last 5 months. I've go back in a second. They're redoing all of the room interiors, were ~2/3 done in March and I'm guessing they'll finish in 2008. Two warm pools and hot tubs, free popcorn in the activity center, fitness room, no bad room views (all pool, pond or flowery landscaped courtyard) and quiet but easier to walk to restaurants, shopping, etc. The only negative would be if you had a 1BR w/partial kitchen - but you'd have a spacious 2BR - very nice. This would be my first choice of the two - especially since you plan at least a couple days doing non-Disney things.