The question is how often do you need to print with more than one material, do you want to modify/add an enclosure to the XL to make it capable of printing more troublesome materials (or might PETG or PET cover most of your needs for less money), & how much does speed really matter in the multi-material scenarios. You will basically never pay for the cost difference with reduced purging unless you are printing with crazy expensive filaments. https://www.youtube.com/watch?v=P4HPnPapKY8