a 4 pizze alfa would be ideal if you are looking for wood burning. it's actually bigger than my brio but smaller than the allegro.
if space and permanence is not an issue, i would go for a full refractory pizza oven. i only got the alfa because it was the maximum weight and size i could manage to hand carry up stairs. same reason i got a 19 TT, can't bring any bigger up the roof..