titainium... one day i'll get a custom TI commuter frame. best material ever, comfy, durable, rustproof.
till then steel is good enough for me. people ***** about steel rusting but you know what? if my bike rusts in half i'll just have an excuse to buy a new bike.... but i see SUPER old steel roadies out there dailey so i can't imagine rust being such a huge issue with a steel frame.
has anyone seen the new stainless steel supposedly being used to build frames now?
http://bikemag.com/news/newsarchive/110305_dain/
sure it will be as if not more $$$ than TI but then you can still say your steel frame "is real" and it will last forever, or till you get into an accident...