I had a pair of stock ported cylinders re sleeved. It all depends on what you want. The ones I had were a Patriot Racing cylinders. I got them cheap because the stock sleeve had a crack. The cost of the re sleeve job was about the same price as buying a pair of stock cylinders, paying for a port job, then doing the finish bore. The nice thing is you start out with a bran new set of bores. I went with big bore sleeves because you might as well gain a few CC's while your at it. There are different sleeve sizes options. The ones I had were 66-68mm bore. Some guys say that big bore sleeves choke the transfer ports but my cylinders still had aluminum next to the sleeves so it didn't on mine. I could see that happening if you go with the larger sized sleeves. With a 66-68mm bore I just ran blaster pistons, and big bore domes with the blaster piston angle.
I had Patriot Racing do the resleeve job. That way when they are opening up the new sleeve ports they are done correctly since they were the ones who did the original port job.