Will Accuphase E-800 be enough to power Klipsch La Scala speakers?

Plenty.  It easily powered my Harbeth 40.3 XDs which have an 86db sensitivity.  I am selling my E-800 with the companion AD-60 phono card for a very reasonable price. It was bought new this past summer. I loved the E-800 so much that I took a big jump into Accuphase separates.  It’s a great integrated amp.   

It is a great amp. Klipsch are very efficient.i have the voice of  theater and are driven with 30 watt tube amp and sound great.enjoy your new equipment and the music.

My first real speakers were Klipsch La Scala's that I bought in 1973 when I was still in high school! They are probably one of the most efficient speakers ever built. It doesn't take much to drive them at exceptionally high levels. My first system included a Thorens TD-125AB turntable with a Stanton cartridge. My one concession to making the system affordable was a Pioneer integrated amp which I planned to upgrade when I could afford it.  I talked my Dad into cosigning for the loan by telling him that I wanted the stereo more than a car. I loaned them to friends several times to use as PA speakers at live concerts. They were special but they were monsters!  We used to crank them up so loud that you couldn't actually tell where the sound was coming from!

That will be a very nice sounding system!