Valve replacement choices?

The guy at the machine shop that is refurbishing my 850 head called and said the intake valves will need to get replaced. He is getting a price from his supplier. As I check the web to prepare for sticker shock, I see that there is a myriad of prices for valves. I need just the pair of intakes. There was a set of Exhaust valves in a box of stuff from the PO and they are being installed already.

Is there a big difference between valves?
I have seen them listed from as low as $25 each to about $50 each.
This bike will be used as a weekender. Probably put between 3-5k a year on it.

Thanks

Kibblewhite Black Diamond valves kick ass.

72westie said:

Kibblewhite Black Diamond valves kick ass.

Click to expand...

And they are on sale at Walridge right now!

Black diamond valves are the only choice to use, nothing else compares unless you go Ti.

Standard valves from Andover Norton are perfectly adequate and I believe cheaper than Black Diamond.

I find that the genuine valves get dented on the top of the stem and make it hard to set clearances.
I'm in the middle of a rebuild right now and I've bought some Black Diamond valves to see if they are better.