Here is what I said previously.
I dont even if I should comment, there are so many threads on this subject over the last 15 years or so. However, you will just have to research the flat tappet issue and all the side avenues that go with that subject and figure out who you think is best. Seek out the moderators here and those who well informed on parts.
Chris comes here enough and knows all the stuff within his line of work, he must know what he is talking about.
However, if I was going to only drive a car few thousand miles a year and proper quality flat tappets pieces where around, then I would save some money. Then again you just dont know. You just have to take a leap in doing your own research.