Impma I understand where you are coming from and think lollystix speaks a lot of sense about identifying what is really important to you.
I earn considerably more than DH, always will and am much more ambitious than he is. I have accepted that we are a partnership and this is just the way he is, it did cause lots of arguments-no fault on either side just different views about a "man's role". I, especially, have had to change my views on this and am happy with the way our relationship now is.
Just thinking about your DH have you discussed how he feels about this? My DH revealed that he felt he was letting us down and got quite depressed about his financial role. Might be worth considering his feelings too?
As for your role, that is something only you can decide. We made the choice to have another DC quickly (age again was our consideration) and in all honesty it has had a HUGELY negative impact on my career. However, that was MY choice- that's not to say that I don't get a little sad inside when I see the person doing what could have been my job but do you know what? I know over the years I won't regret it one bit!
Financially, I'll be returning to work pt. Again my choice, it will leave us less able financially, but DH has supported me 100% in this. With planning I think we will be able to manage the things like ski trips (yes, I had all this and want my DC to if it's possible). It means we won't have as much to spend day to day but you make cut backs. Ebay has been a god send! It's the same with living arrangements-could you live in a cheaper area? Find a way that works for you, but you may have to compromise your "ideal" along the way.
At the end of the day, as others have said you and your DH are a team. You need to make choices together that you can live with but you cannot force the way you think things should be on someone else.