Gandalf,
I had the Solution 2 and the BigExcel in the past and I would prefer the BigExcel today. Reason: Years ago - if not still today, I don`t know - the rear part of the Solution 2 fuselage was(is?) quite heavy which required additional ballast even though I positioned the battery at its foremost position. At the end the plane was over 3 Kg and really fast.
Today I fly the Alpina 3001 with very satisfying results. The 2501 fuselage seems to be quite narrow and the wings are very sleek which reduces visibility if you want to fly high.
Thus, it is always difficult to answer a question like yours because you did not tell us what you are considering as "good" ...
Herbert