Does "Unbiased" have to mean you dont have an "Opinion"?

[forevercloud3000]

nice to see a lot of intelligent and mature answers in this thread.^^

What I would like to say is if I look at three platforms, decide what I feel is a strength and weakness to each one, deliberate and choose only ONE, does that make me biased for then on out? I gave an even assessment to the situation and chose the best to my ability. I could say, "I think____is better", althought that is just my "opinion", if I give evidence to my conclusion does it have to be "biased"?