My 455 American is outstanding. It's real purrty and shoots better than I do. I have 3 barils (17hmr, 22lr and 22wmr) I have to many rifles to buy so I liked the idea of a single gun with different barils for all my rimfire needs. Cost was 575$ for gun with 2 barils and I bought the third baril a few months after for 200$. The sako quad with all barils will prolly end up costing you at least 2x that. Actually just checked and Lebaron has the quad with all 4 barils for 2000$. I have never heard of anyone unhappy with their CZ.
Actually, at 2k$ you could get yourself a Anschutz which is way better than either of these.