It's all about your trade-off between what you want, time, and money. Do you want the desktop equivalent of a fully-loaded 16" MBP or a low-mid-range Mac Pro? I

It's all about your trade-off between what you want, time, and money. Do you want the desktop equivalent of a fully-loaded 16" MBP or a low-mid-range Mac Pro? Is $3000 a significant amount of money to you? If the answer to both of these is yes, it's worth it.