With respect to blocks, I upgraded last time using Chuck Passaro's and found them to be great. For my upcoming build, I thought I'd try something different and bought them from Chris Watton at Vanguard. I believe these are from Master Korabel. I haven't got to the rigging stage yet, but experimented seizing a couple of them in different sizes and they are really nice to use. They have deep grooves at the corners and hold the line extremely well.
Both Chuck and Chris are great to deal with. In both cases I received the orders quickly.
David