I love the set of Michelin HydroEdge tires that I got .... but they are a bit pricy (they do come with a 90,000 mile warranty)
If you go any wider with the tire, your speedo will be off by a mile or 2, also you have to make sure that the 205's will clear and not rub. Wider tires will flex more as well (loose some stability while turning), but do get more traction.
I got a set of P235/60R16 while my car's stock size is 225, the way that my car handles and turns is different now, not a bad thing, but it feels different.