This is the debate I am having with myself at the moment for an up coming weekender. It is tough choices all round.
As to mids vs hi-caps? I am definitely a bit of both. With my first game back this sunday coming I will be taking 4 hi caps and be expecting the refill at lunch. No I dont care, its been too long. However I have ordered a load of midcaps and I am looking forward to the change and challenge.
As someone mentioned hicaps for a dug in defence are fun to keep the attackers heads down.