as aggressive as the rest of the bike.How aggressive do you want them?
The Hot Rodder's creedo is "if you can build it yourself you should" Use regular mild steel, 7/8" tubing is common and have at it. I've built bars for my XS1100. Be precise, if they're not the same left to right it'll be easy to feel the difference.
i think you guys are missing the point... i wanted to be TALKED OUT OF THIS, at this point i'll probably put it off til i get some miles on the bike. then i can take the bike into work with the good welder and chop saw and i'll make them on a saturday or something.