It is probably worth noting that standard off the shelf sealed beams suck for light output. Though I don't know how good your current lights are either. If you are going to swap to sealed beams I would plan on upgrading to one of the led options (truck lights?) or going with a hid swap.
I just ordered a set of these from Amazon
http://www.myhellalights.com/index....on-headlamps/vision-plus-conversion-headlamp/
$90 for the pair. I'm sure they won't be as good as the higher end replacements but Hella makes good stuff so I figured they were worth a shot.