KT150s in Audio Research Ref 110.


Is anyone using KT150s in the Ref 110 and what is your opinion please?  ARC told me that they weren't recommended but I've read differently.  I'm currently using KT120s. 
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You’ll burn up the power transformer in time. You will shorten its life.
ARC power transformers are very expensive.

KT 120
Plate current 135 - 165 ma
Heater current 1.7 - 1.95 amp @6.3 Fil V
https://s3.amazonaws.com/tubedepot-com-production/spree/attached_files/ts-kt120.pdf?1382029860
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KT150
Plate current 150 - 180 ma
Heater current 1.75 - 2.00 amp @6.3 Fil V
http://www.tubeampdoctor.com/images/File/data%20sheet%20KT150%20Tung-Sol.pdf