We need from Meridian more than their pre-announced trade-in option costs and the cost of new units.

We must also get from Meridian much more detail of the specific improvements in the 861 v4 and 808.3 so we can make an informed decision about the worth of a trade-in for their requested price. The details Meridian have released and/or released apparently indireclty from Meridian to date have not been clear and consistent.

I agree with VK that reports coming indirectly from Meridian HQ of "dramatic improvement in sound" are nice but not enough. More specific info is required. Eg, and for me, is improved sound in the 808.3 compared to 808.2 the result of only/mainly the analogue inputs that I would not rely on?

So don't just focus on the trade-in cost.