I like Toledo steel if your life depends on it.
At least for swords and other knives.

For bikes, I've come to think the use/geometry of the bike should probably dictate the tubing.
I didn't always think that way, but it makes full sense to me.
I'd probably prefer a frame made with a mix of chromed Tange Prestige/Tange 1.
If the identical frame were to be made with a mix of SLX/SL, I'd not know the difference.

I'd like to try a Diadacchi frame some time.