Their early albums were Steven Wilson by himself,The music psychedelic.Then with The Sky moves Sideways,Pink Floyd influnced.Signify they started rocking out,Stupid Dream,A Masterpiece finds them very Beatlesque with The song Don't Hate me,Think Pink Floyd Dark Side sorta.After that Lightbulb etc, they get heavier and heavier,think Tool maybe....If someone could replace Rodger Waters it would be Steven Wilson,A very prolific songwriter/songwriter.Their latest "Fear of a Blank Planet"is right in R Waters territory as far as the theme goes.....You need all their albums and you will quickly find out that a very large portion are highly collectable,well over a hundred for Many."Recordings"for example $150 plus.Steven Wilson is also a master marketer.I met the Band on the Stupid Dream Tour in SF Progfest and in LA House of Blues and a in Store signing at Tower.They were Absolutly Great then and The Best Underground Band out there.They've had a cult following for years and finally on a major label the last few years.And back to probably their own label to for certain releases.Steven firmly in control of his business.And as Trippy ,Proggy and Hard Rock his Music is unless he has changed,He doesn't get high.Never has is the word.Maybe thats one reason why he is so successfull and can be in several bands at a time..I have a huge PT Collection.CD,DVD-Audio's and LP's.Stupid Dream era on back Signed while on SD tour.Steven asked why people want their nice cd covers scribbled all over,I told him his Band was going to be big and I would sell them for Big Bucks.He Laughed.Huge Prog/Psych collection also.Enjoy your PT journey.I personally like the Lightbulb Sun and Earlier stuff.I bit mellower.If I was younger I'd probably like the later stuff more,Maybe.I'm 63.JD