I find the Integra to be very "digital" sounding and it has a tuner which immediatly removes it as "serious"pre/pro due to degredation of audio quality because of it.
The Lex is purely HT and it is excellent at it.The Sp1 though very nice sounding is not that upgradable in my book.
The sleeper of the whole bunch is the Aragon.It has ajustable bass management both for HT and stereo down to 30hz,sub may be used in stereo mode,fully ajustable,input levels,variable EQ,fixed EQ,interchangeble modular design for upgrades including HDTV,DPLII,DTSEX,class A operation in analog,ect.Only down side is 24/48 dacs,but that is soon to be changed to 24/96.Basically it is an Aurum preamp.with a processor.You should demo all of them and choose what is best for your taste.
The Lex is purely HT and it is excellent at it.The Sp1 though very nice sounding is not that upgradable in my book.
The sleeper of the whole bunch is the Aragon.It has ajustable bass management both for HT and stereo down to 30hz,sub may be used in stereo mode,fully ajustable,input levels,variable EQ,fixed EQ,interchangeble modular design for upgrades including HDTV,DPLII,DTSEX,class A operation in analog,ect.Only down side is 24/48 dacs,but that is soon to be changed to 24/96.Basically it is an Aurum preamp.with a processor.You should demo all of them and choose what is best for your taste.