DWB Did you get a good night eventually?
Could you maybe put him down, asleep, but in the sitting room (in a rocker, or changing mat covered with a blanket) and then take him to bed with you when you go? James seems to be ok doing this sometimes, as by the time I've brought him all the way to bed (er, in the next room) he wakes up. I also think he may have outgrown his moses basket but we haven't bought a cot yet
Also, I don't know if this is what Ethan does, but he's started having a big feed then little sleep at 7, when I move he wakes, but then about 8.30 he has another feed and then is often asleep from 9 for a good few hours. (This is a good night, sometimes he wakes again at 9 and doesn't sleep until 10 or 11, or wakes at 11 etc etc).
Anyway, I just think of the 7pm one not quite as a nap, as it's very short, but as part of his winding down time - I know then he is tired and relaxed, but needs more milk or sucking to get to sleep properly. Does this sound like Ethan? I know that doesn't leave much of an evening left though.