110LS or 150LS or 75-150LS with an extension tube
Sync will be fast, but you'll loose autofocus (but maintain focus confirmation). Also, depending on how "macro" you'll be going the quality may or may not be what you need. If you're doing a tight headshot you'll be very pleased. If you're trying to shoot an earring you probably won't be (for that a dedicated 120 macro will do much better).