Another vote here for the Shaeffer No Nonsense range.
I find them extremely comfortable to use and ultra relable.i.e. they always write first time everytime.
The cartridges are easy to fit and hold a considerable amount of ink and can be refilled with a syringe easily.
Only downside I have found is that sometimes(dependant upon knib fitted and age)too much ink is deposited which although providing a super smooth writing experience does lay down too wide a line.
Overall My favourite starter pen.
I'd be interested to learn what you finally decide on and whether you enjoyed the experience(writing I mean not the exam!!)