One thing to really consider is how they will handle the wind, something the cheaper domes don't do very well.
On our Madigan trip although we didn't use the tents, swagged for all but 2 camps, we did have some very windy days/nights.
A friends dome when we got to Louth had to be very well pegged/tied down, the centre pole jobs didn't look like budging.
Martyn

