for how pretty I think Ti bikes are heck I think that GT is drop dead sexy. I have found that compared to steel that they tend to be heavier for the same stiffness and/or more flexy.
I have ridden the Salsa Selme ti and felt its was too flexy although very complaint, it still was not light for sure not as light as the old scadium/carbon first gen selma's.
Steel on the other hand, I have a mass produced cheap steel frame. it light for the price, and IMO way stiffer where it needs to be well still having the magic carpet like steel ride. The only hardtails I have liked better than the redline are the Niner steel bikes(SIR and MCR), the Old salsa Selma/mamista, the Niner Air Nine carbon , the giant XTC 29er carbon, and my next potential SS bike the Kona Honzo(game changing bike though due to its progressive geo). For how much I would love a boutique steel frame from Hubcup, spot,, elect the cost is absurdly high and IMO not any more value than the mass produced frames. I can build a whole carbon bike for the cost of a frame in many cases and trust me carbon is the best material (short term) for making a bike out of.