I'm within a few pounds of you and tend to ride 70s-80's steel these days. Really like my 531 Austro-Daimler, but found a 531 Masi I once owned a bit on the whippy side under my weight. It felt like a suspension bike the way it soaked up bumps but when sprinting it would load up and spring. Had I opted for 631 or higher I might have been happier but the geometry was an issue too. A frame with enough clearance to keep my heels from smacking the chainstays and with enough clearance for 28 or 32 tires is really good. Even a less expensive steel frame with tires of that size can ride nicely. I stay away from modern weight weenie wheels and carbon. Snapping off a titanium spindle pedal once was enough pain to teach me that training and form can do more. Have fun.