It would be more than passable as a summer bike, definitely. It handles like a road bike.
It'll never be super light, but if you were that worried about the weight you probably wouldn't be looking at steel in the first place. It's barely noticeable on the road.
I did look at the Kinesis Racelight T2 frameset, which wouldn't have been much more expensive (and would definitely have been lighter), but I'm not really into the way they look.
It would be more than passable as a summer bike, definitely. It handles like a road bike.
It'll never be super light, but if you were that worried about the weight you probably wouldn't be looking at steel in the first place. It's barely noticeable on the road.
I did look at the Kinesis Racelight T2 frameset, which wouldn't have been much more expensive (and would definitely have been lighter), but I'm not really into the way they look.