Wouldn't it just be simpler to sell the house, divide up stuff you want to keep and then walk away with your own pensions.
Arguing over pensions is going to turn an amicable divorce into war of the roses.
Keep things friendly. Take the hit on her pension.
Get things sorted as quickly and cheaply as possible.
Getting her pension involved could hand all your assets to the legal profession.
But the sensible advice is to go to a lawyer
If you are both in your 40s and married when you started work then its a "long" marriage of about 20 years at least. Pensions are definitely marital assetts and should be taken into consideration. You are thinking the right way, pensions are just another investment. People do get precious over "their" pensions. Thats why cases go to court, not because of the lawyers.
I'm genuinely not sure why individuals' pensions are in question here. And, at least in pragmatic terms, if what is sought is something amicable, why would anyone want to mix up an arrangement based on an individuals' salary, years of service, etc, with the genuinely joint divisible assets? That seems to me to be bound to end in a nest of vipers.