Bronze or OEM cast guides on a rebuild?

[Onefast99gsx]

Hi all-

I got my new stainless steel valves yesterday. It turns out that there is too much play in the guides. They will need to be replaced according to my engine shop this morning. He told me that he will put in whatever guides that I supply him with but he recommended going with the stock cast guides. According to him, the stock ones stay more consistant throughout the heat range or something.

What do you engine builders recommend, stock or OEM cast guides?

Thanks.