I'm in the market for a new freewheel for my Medici. It currently has a Regina freewheel with a really low range. I want something within the 13-28 range. I'm using a C-Record rear derailleur and am sticking with friction shifting.

EDIT: Looking for a 7 speed

So far I've heard;

IRD
Sunrace
Regina

I'm interested in IRD since they're so highly spoken of, but is it really that much better than the Sunrace at 3-4x the price? If the quality and difference is there I don't mind shelling out the money, but I'd like some user opinions before doing so. Also, with a new freewheel installed would I have to get the wheel re-dished?