Those blocks from Mr. Passaro do look outstanding - and the prices are remarkably low. I'm not sure whether they'll ween me away from Bluejacket's (my longtime favorite - though Arnie's reservations certainly are justified), but I intend to order some and take a careful look.
Bluejacket blocks and deadeyes can be made to look mighty nice (at least to my eye), but it does take a little effort - and good closeup vision. If you're using unstropped ones (for a Constitution you are), and in the smaller sizes, the first thing you need to do is clean up the groove around the block with a small knife-edged file. And you may need to ream out the sheave hole a little. I generally count out the number I think I'll need for a work session, clean them up, and string them on a piece of fine wire. If you want them to be black, BJ sells a liquid called Pewter Black that will blacken them chemically in a few seconds. (It's a good idea to give them a quick spritz of Dullcoat to be sure the black doesn't rub off.) If black isn't the right color, I shoot them (still strung on the wire) with Floquil grey metal primer, then brush paint them. It really doesn't take long. To me the toughest part is filing out the groove without going crosseyed.
But Mr. Passaro's wood blocks may shift my allegiance.
Youth, talent, hard work, and enthusiasm are no match for old age and treachery.