I don't know if you really require from the solar kit to be portable, like the one into a CD carying case and tin foil box, because if you don't, I could propose you a better and more standard way to do things.
I would suggest you to go with two 30 watts solar panels. That will give you more flexibility than just one 60 watts panel for the size and charging capacity of the batteries you could use (and you could start with only one, it's softer on the budget). Here's a quick overview of what's available on the market: http://www.mrsolar.com/page/MSOS/CTGY/wattsort