Good pension calculator?

I've looked at a couple of pension calculators online (pension boards, etc), and haven't seen one that can help me work a couple of things out...
I'm in my mid 30s, have just moved 3 old pensions to my current employers AVCs pension scheme (they have a defined benefit plan with no contributions by staff). I've an updated information from my employer regarding my expected income based on working until I retire, but I am interested in finding out how my AVCs will add up.
I have a fund of approx Eu15k transferred, and am currently paying 16% of my salary into the AVCs scheme...
I just want to factor in, a lot of 'what if...' scenarios, what if I transfer SSIA next year, what if I take a career break, what if I max out my taxable pension AVCs, what if I drop to part time hours...
All the calculators I find seem to be based on the idea that i have never had any contributions, and I am starting my scheme today...
Has anyone seen such a calculator online?

There are a couple of pension calculators linked here in case they're of any use?

Hi - normally if you want a more sophisticated calculator that allows for low interest rates, longer life expectancy that we have nowadays etc...you may need to go to an AA like ourselves, also to factor in things like SSIA transfer, existing pension arrangements, whether you have dependants or not etc...this can all be done but there would be a small fee for such a report!

Anything useful here (mostly US orientated but still possibly useful):

[broken link removed]
http://www.ifigure.com/money/retire/retire.htm

Looks like the usual generic calculator stuff Clubman!