Upgrade from my Modwright KWA 100SE


I am considering a KWA 150 SE, but not sure how significant a jump up it is from my current amp. Any experiences shared are appreciated or alternate upgrade paths. My speakers are my own Open baffle design (Satori MW16P and TW29) with a GR research H frame subs with AQ370 Amps. preamp is LS100. Thanks.
jimbones
ps: Here are the specs on the Audio Analogue Donizetti Anniversary Power Amp :
2 x 250 Watts @ 8 ohms.
2 x 500 Watts @ 4 ohms.
2 x 1.000 Watt @ 2 ohms.
Fully balanced.
Dual mono configuration.
Zero feedback circuit design.
Audio grade discrete components.
Power filter 2 x 56.000 uF.
Power stage 2 x 1.2 kW transformers.
Price : 9.500 € (approx $11kUSD)

@jimbones Yes auditioning AA gear could be an issue, but you could talk to thier Canadian Distributor, Audio Alliance in Ontario who should be authorized to sell into the lower 48. They might offer a home trial + cost of shipping?

Another amp I can recommend is the Audio Flight FLS-4. That amp is well built, powerful, smooth sounding & musical. However you’ll run into the same issue with local Dealers, as the nearest Dealer is in Canada - http://www.audia.it/products/fls-8/stereo_power_amplifier-9/fls4-17.html.
Otherwise that deal on the minty KWA-150SE is hard to beat.
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@d2girls, have you heard the Maestro Anniversary Integrated? That said, the amp I mentioned to the OP is a brand new (and much more powerful) model..