Are hardened valve seats necessary?

[767Jockey]

I'm about to have a set of Cleveland 4V heads redone. The engine will be a 408" stroker Cleveland, with about 10.5 compression ratio, run on 93 octane. The car won't be driven more than about 4000 miles per year, and while I'd like to do more I don't anticipate more than one track day a year, if that. Here's the question, the guy redoing the heads wants to put in hardened exhaust valve seats. I know that it certainly wouldn't hurt to do so, but all things considered I'd rather not do them if I don't need to. Once I start adding up all that CAN be done, rather than what NEEDS to be done, I'm starting to get into that very annoying territory where you find yourself saying ......."for just a little bit more, I can get these awesome CHI aluminum heads"...... I would really like to keep these low cost, but well performing. I don't want to screw things up and do it on the cheap, but I don't want to pay for things I really don't need either. Any ideas on this?