$4000 BUGDET - YOU ONLY HAVE 2 CHOICES - YOUR FEEDBACK MUCH APPRECIATED

Neither on LaScala's IMO after owning LaScala's for a number of years and trying many amps you really need to hear good tubes on them. and low power SETs. 

If it was me I'd get the processor you like ( room correction is a big plus IMO) and use low powered tube amps on the LaScala's. 150wpc is so much more then you will ever need considering 2-8 watts is plenty for any application on the 105db LaScala.

Personally I'd get the Anthem over the Yamaha just because of the room correction, its that good. and run low power tube amps on the mains. The room correction will integrate the tube amp and the rest so no worries there and the subs will be controlled as well. Sub integration will be the hardest thing with horns so I'm betting the room correction will help quite a bit here.  

Agree with @glennewdick

I have a pair of LS IIs and a pair of 15" subs. Tubes are the name of the game with Klipsch Heritage speakers.

Edit #1

Nice room, BTW....

Edit #2

Looks like you might already have a Cary tube amp. Hard to tell from the picture.

anthem

Awesome advice!