shooting it handheld is definitely doable, it's how I shoot mine all the time. The L-grip, motor drive, and AE prism really help in that regard.

All the lenses are good, and extremely reasonably priced vs. what they used to be new. Can't go wrong with any of the ones mentioned, however I'd recommend not bothering with the 90 or 127, as the 110 is better than both.