I got into Saga around 1994, because I heard they sounded a little bit like Rush, and I saw a Saga album on sale at a record shop. That was a Saga compilation album, which was very good. After doing a little more research, I discovered that my favorite songs on that compilation came primarily from two Saga studio albums, namely Silent Knight and Behaviour. I also heard people talk about how Worlds Apart is the group's masterpiece and The Security of Illusion was their best latter-day album.
To make a long story short, over the years I picked up every Saga album all the way through the recently-released Marathon, and in my opinion, Silent Knight and Behaviour are head and shoulders above the rest of them. However, I also give good marks to recent efforts Full Circle and Marathon, both of which have some amazing songs on them.
Behaviour definitely sounds like a passionate, musically-interesting accessible rock album with progressive overtones circa 1985. I think it is marvelous. If this description sounds interesting to you, and you don't think that "keyboard" is a bad word, I urge you to check it out.