I like the approach Harrison's takes to each disease. Some basic pathophysiology, physical examination, lab findings etc. It gives you a solid understanding of whatever disease you want to read and why certain findings are present. Uptodate is more of a quick reference for me and like the name suggests, just gives the most recent evidence based medicine. It doesn't give much pathophysiology so your're essentially just memorizing stuff. Not my style personally but I use UTD in the hospital and Harrison's at home to brush up on basics.
For a prelim Cecil and Harrison's is over kill. Get the washington manual, perfect book for you. Not as in depth or detailed as the former textbooks but more detailed than the pocket medicine.