Not a chance in hell. The price is something in the $40K range. Worse than the absolute outlay is the fact that the cross over will worth $10K tops on the used market the moment I take it out of the box. As a rule of thumb, I take a maximum of 20% depreciation hit on stuff I buy, not 75%. I also don't have the space for an additional tower (which is how they are packaged). Finally, I don't like the idea of paying top dollar for ultra expensive cabinet work to house a crossover.
Hmmm...I see where you are coming from. if you were selling the crossover by itself the day after you opened the box, 75% depreciation or possibly more...but that is mainly because very few people own MM3s...that's a liquidity issue.
By contract, if you bought the crossover for say 25% off (30K)...then in truth you can sell your entire MM3 as a latest spec MM3...which means you might REVERSE some of the depreciation on the MM3s themselves because the money you put in there gets dragged upwards by the fact that they are now part of a latest spec set.
As for the extra space and cabinetry, I respect that those are your personal decisions. Was just thinking about the depreciation bit mainly.
In any event, you have made your choice to look elsewhere...good luck with that. Your MM3s are supposed to be quite good, so you might just need to spent quite a bit in any event to beat them...particularly if you are looking at new products where there is no depreciation advantage.