Update and thanks to all who made suggestions - I have a set of Neumann KH150s to try out alongside my studio stalwart 8351Bs.
Deceptively diminutive in size, the KH150s, while initially deviating from my original search parameters, exhibit remarkable prowess in low-end extension, nearly rivalling the 8351Bs in terms of auditory impact. Their performance is notably impressive, especially given their price point of just under 3,000 Euros.
Beyond their laudable low-end capabilities, the KH150s excel in the realms of clarity and bass purity. Despite not reaching the deepest frequencies, they boast a compelling low-end presence - particularly noteworthy for a speaker of this compact stature. This characteristic extends across the entire audio spectrum, presenting a balanced, open, and warm, yet nuanced sound profile, underscored by a remarkably flat overall response.
The transient detail is both pure and intricately rendered, shedding light on why enthusiasts consistently prasie this facet of Neumann monitors. Further exploration in additional mixing sessions will be necessary to definitively ascertain their suitability, but the current trajectory suggests a positive outcome. The bottom line, they may very well be keepers...
A noteworthy advantage is also in the prospect of portability; as I would contemplate taking these monitors, accompanied by the Neumann MA1 kit, during my upcoming travels for movie score mixing jobs early next year. This consideration, notably absent with the 8351Bs, adds an additional layer of appeal to the KH150s.