You have hit the nail on the head. If you were prepared to accept a higher risk stratergy and "larger" fluctuations over time, then the Equity Fund would be te favoured option. A with-profit based fund would not be a first choice due to any potential future MVR (exit charges) there may be. Cash Funds are usually ok when you have only a few years left till your intended retirement age. Aas you are only 28, I would advise against a Cash Fund. A balanced fund would follow a generally Medium risk stratergy as they are usually balanced between equities (stocks and shares) and fixed interest or property type investments. I would go for the balanced fund as then you are giving it a reasonable chance to grow over the next 30 odd years until retirement.
An equity fund would be my first choice as it is only �1k, adn if you arent going to add to it...then what have you got to lose...equities have out perfomed any other asset over the last 20 years....including property......