I won't try to talk you into putting a rack on your Silvio, but it is what I did, and rather like the way it came out. I didn't want something big and heavy, so I went with a Tubus Airy, made of titanium. I like the more minimalist look and how it tapers in toward the top. As racks go, it doesn't draw attention, and at 360 grams (including mounting hardware), it's no boat anchor (yet it's rated to carry up to 60 pounds of stuff). It carries panniers just as it should, but when the bags are off and I go for a ride, this bike still flies.
Two issues: this rack can be hard to find, and it ain't cheap. I found this one in Germany, in a eBay auction.
Find many great new & used options and get the best deals for tubus Airy Gepäckträger - Titan Silber (33000) at the best online prices at eBay! Free shipping for many products!
www.ebay.com
I figure options are good.