Tent Options (aka Can of Worms)

I don't intend to waste anyones time so I've read all the tend posts on this forum. As posted previosly I'm re-gearing after a child induced absence from bushwalking. Members so far have directed me to a new stove and sleeping mats (special mention to Slider) thank you very much. Like a previous poster I'm looking for a four family tent option. There is me, my wife, 13 year old son and 11 year old daughter. I need tents that will do the four of us in the Blue Mountains in the middle of winter and my son and I in the high country in Winter. My feeling thus far is to get an Exped Gemini and a Hilleberg Kaitum, Nammatj, Nallo, Jannu or Allak. I've been using a North Face VE 25 lightweight versioin for 20 years which has done me, my wife and fellow walkers - don't laugh - and I'm slightly wedded to a dome tent and slightly extra weight - 3.2kg - however it seems time has marched on and the lightweight movement has taken over. Doubts so far include:
- warmth of mesh inner in the Expeds when it's around freezing in the Blue Mountains.
- condensation in Hillebergs in Australian conditions
- which of the bewlidering array of Hillibergs to chose from. I feel the Nallo's maybe a bit small with the tapering ends for example.
My intended uses will be NSW low and high country, Tasmania and NZ.
I've also found a Black Diamond Mesa (which Outdoorgearlab rated number 1 for 3 season backpacking) for $300 on special. I was wondering whether that might be a reasonable option for the second 3 season tent at half the price of the Exped.
- warmth of mesh inner in the Expeds when it's around freezing in the Blue Mountains.
- condensation in Hillebergs in Australian conditions
- which of the bewlidering array of Hillibergs to chose from. I feel the Nallo's maybe a bit small with the tapering ends for example.
My intended uses will be NSW low and high country, Tasmania and NZ.
I've also found a Black Diamond Mesa (which Outdoorgearlab rated number 1 for 3 season backpacking) for $300 on special. I was wondering whether that might be a reasonable option for the second 3 season tent at half the price of the Exped.