Krell - Martin Logan power question.

Got a system: Krell kav-500 five channel Lexicon dc-1 4 martin logan clsIIz 1 martin logos 1 velodyne hgs18 1 velodyne fsr-15 neutral reference speaker cables audioquest interconnects Would upgrading to the Krell kav-1500 amp help with soundstage or sound? I am at 200watts per channel into 4 ohms and the new amp would bring me to 600 watts per channel. Please give me an idea how this would modify my overall “sound”. The room is about 20’ by 60’ by 9’ high. The front speakers face the 60’ length. The front speakers are 12’ apart from each other. The rears are 12’ apart from each other. From front to back, the front speakers are 18’ from the rear speakers. So the speakers’ sweet spot occupy the area like a 20’ by 20’ room. I want to use the system for both HT & music. However, I often play my HT at low volume, which helps explain why I use the electrostatics. Please help with this. I don’t want to invest in more power unless I hear from others, but my friends suggested I do so.