+1
HK are great if you aren't in a hurry. Orders that I place with them tend to be orders that I then just forget about, so when they arrive, it' a nice suprise!
I must say, I'm finding more and more HK stuff turning up on sale in the UK, at pretty good prices, so these days, unless the saving is massive, I tend to go to the UK supplier to get the delivery.
In the UK, for 450 and 500 parts, check out:
http://www.helisfromdevon.co.uk/hfdcart/
The quality is excellent, the delivery is next day free in the UK.....and the service is awesome.