Best bench grinder???

I have a plastic Craftsman "tombstone" in the garage. It SUCKS but it was free.

I have a Dayton 1/3 HP at the shop and it is stronger than most 1/2 HP units.
it was $20 at a thrift store.

I recently picked up an HF 8". Not sure on HP, but it will spin the grinder stand I have it on which is attached to a 17" Dodge truck wheel and a 10# weight. I'm going to have to bolt it to the floor! $10 with the stand at a yard sale. Came with a box of stones, wire wheels and buff wheels