Wade:
Should I be worried about the surrounds from hifi?
Good and bad;
Bad: The last couple of times, I sat with surrounds from them, they didn't fit.
I was sold no less than three different surrounds that were all guaranteed to fit the same driver
but none of them did. Some were far out (22mm off diameter on a 10 inch).
With CX surrounds, I've had several different that owners brought in with the speakers.
Some were not at all suitable, others were err.. somewhat nearer.
I would say the general fit rate is about 40% in my experience.
I suggest you check all diameters and angles before applying glue.
Good: I never had any problems getting a refund when returning the surrounds (less return postage).
Some people can make them fit, I am not sure if they are better DIY'ers than I or they just have more luck.
Martin