Upgrade from my Modwright KWA 100SE

Same amp basically so not much point

 
Not true at all. Different designs. The 100SE is a MOSFET amp. You will get better detail and resolution out of the 150, which will bring bigger more spacious soundstage. Also more refinement and much deeper low end. 

OK so other suggestions have come in. One that is intriguing is the Wells Inamorata. How does that compare to a KWA 150SE?

Personally, I have the Maestro Anniversary, but it’s an integrated, not power amp, even though it works as a power amp too. I have one, and love the sound. For the info you can contact Audio Alliance in Canada, they’re distributors for North America, or in the US contact qaudio.com in Cambridge, MA, or audiowaves.com in California, don’t know the city they’re in.

Jriggy...some parts upgrades but no fundamental differences!  Both MOSFET designs.  They don’t double down on power either which is kinda strange given the robust build.

the KWA 150 is a bipolar design the kwa 100 is mosfet, totally different topology