Re cassette players. I removed mine and fitted a standard single CD player available for £80 or so from most outlets. Despite appearances the standard Fiat unit when removed with the DIN prong thingies left a standard size slot to fit a DIN size cage. This leaves the cubby hole above for CD's , pens or stuff which you don't get with the standard Fiat CD player which takes up all the dashboard. I prefer this arrangement as you keep a bit more storage as there isn't much anywhere on the dashboard. Only negative is you have to take the front panel off when you leave the car, but saying that you can always choose your own CD player to suit budget and spec.
I would go for any 1.2 over a 1.1.