For you? or your wife?
The 55-200 can have some nervous bokeh depending on the situation. However for the price point it's a nice lens.
Talley if your gonna use your wife's camera can you deal with f/5.6 @ 135mm???
The f/4.8 at 200mm (55-200mm) is much more tolerable for me than f/5.6 @ 135mm.
I hear you here,,,,,thats why I couldn't handle both and needed the 50-140 2.8 and if I need more reach I throw the 2x on and take the 5.6 at that point!