I like my R-20, but you are correct. It is a monster to program. I have made a few attempts at it, by hand and with the software and havent had good results. The full keypad makes it much easier to use in the field and dual watch is great. Having the high-end of the 800 Mhz range blocked is not a plus at all, but the built in recorder is awesome. I have recorded several interesting events with it and it works great.
The Lithium Ion battery is excellent. It lasts better than 16 hours. Sensitivity is somewhat of a toss-up. I've heard the R-5 can out do the R-20, but it is supposedly even more difficult to use.
Of all the equipment I have, I must admint that the Yaesu VX-7R is the hottest little receiving radio I have ever had. It flat-out smokes all the other gear I have for receiving signals on conventional frequencies. I can have all of the rigs you see on my signature running side by side and the Yaesu will pull something in that none of the others will hear.
If I had to grab one going out the door in a hurry, it would be the 396. Make sure to check out the Monix page for all the T-Bird freqs. They are all correct after listening to them Thursday and Friday. I did hear some ground traffic on UHF today too.