oversize exhaust valves worth the $$??

[440exnacsracer]

hey, my predator dropped an exhaust valve yesterday and i was wondering if oversized exhaust valves are worth the time and $. i will be using stock intake valves, and will have a mild port/polish. thanks
Ben

[MY450R]

good question
i would think it would be worth it
but i dont know for sure

[440exnacsracer]

the oversize valves are the same price as stock ...$30 a peice, itll just take alot of time to get the seats right i guess??