Oh hi firstly I'm a bit 
but understand completely ..
We had just refurbished our house, all interior and landscaping with conservatory too, then moved suddenly due to fab job offer. Bought a modest 3 bed semi, new build show home with everything left in it as a stop gap and we still here 5 years later. We have a second on way have a ds 5 and decided to stay here for another 2/3 yrs but there is no way we can have older children and us living in this house it is just too small! I have only just given in and had tiling done, shower and decorated, as didn't want to do it all again. I say look:
IMO its important and natural to make where you live your home re all your work ( wished I'd done ours much sooner)
You might not have sold it otherwise or it will help to sell
If you didn't feel this way you'd be pretty detached and cold me thinks!
Imagine your dc's as teenagers and compare current house to larger one, they'll want there music/ privacy etc some where to study, and peaceful spaces for you too.
Your new areas sounds nice look more at schools etc to further clarify benefits
Doing a full house again must be daunting, practically and financially, remember how long it took you to do current home, through yourself into project managing transforming this one, immediate essentials, carpets curtains etc.
Most important, moving house is one of the most stressful things to do - fact, that's why I'm waiting til long past newborn stage 
so yes emotional it is.
Start to go shopping and put together some design boards for new rooms.
For your garden, take some nice picks, or pay a photographer, put into nice album online or actual. There must be some plants you can take, look up what clippings you can take, this way your garden will always be with you.
Have you sold to nice family, try and think how lucky they are to get your lovely home.
I don't know if this is any good but hth