I'm probably a shabby hobby guy because I can't work to 50 millionths of an inch so I rarely use blocks. I have them but I don't use them in the shop because then I can't use them for metrology purposes, which is why I bought them in the first place.
If you need USER blocks, I would buy a cheap import set or a used set and just use them. No point in spending big money on blocks that you're afraid to scratch. Just confirm the size of the block before you trust it, then use the heck out of them.