Francesco's right. I also have been listening to their first three albums and 3 is the one I actually never play, although there are a few decent songs on it.
It's hard for me to choose between their debut and Hold Your Fire, so I'm not gonna do that. I love both albums and that's more than I can say about 3. So if you find them somewhere, which shouldn't be too hard I believe, don't hesitate...

Fred