I bought some 205x50x16 wheels and tires from CheapWheels.com and the hub rings to get them to a proper fit and have found them a revelation in sticky cornering.
I know that ALFA puerist may have a problem with the big tire look but it sure feels a lot better than the original wheels and rubber.
I got the whole package of four tires (Bridgstone Potenza 50 series) and TSW Kyalami 16x 7.04x100/108 ET20mm hyper black for $1000.00 and I can't see myself going back to the 14" rims and gumball tires that came on the car.
I kept the old rims in case I want to put them back on with so Hoosiers to due autocross and not get nicked for the 50 series tires.
I'll post a picture in the next couple of days and see what folks think.
I wish I could re-find an old pic I saw of Dan Gurney (Eagle Weslake) and Jim Clark (Lotus 49b) in a slightly overhead shot going side by side through the Curva Grande at Monza in full four wheel drift during the 67 F1GP. Give ya a whole new appreciation for what the word really means as opposed to what the ricer kiddies want it to be