Valve Guides

[RC1NUKE@aol.com]

I mentioned this on another E-mail but didn't get any response.
Does any one have experience with bronze Vs steel valve guides?
Is the bronze better for a street engine or does it just transfer the wear 
from the valve stem to the valve guide?
Would Roller rockers be a better investment to add longevity and performance 
to the engine?
Don't most OEM engines including high RPM stuff from Japan use steel?