Does anyone remember how a Power Mac used to be a power house of computing? Now it resembles something like a vase for flowers.
The PowerMac line ended in 2006, almost a decade ago. The fact you could use one as a flower vase proves the superior design - there aren't many computers that can be reused in such a way once they become obsolete!
If you want to use a Dell, I would advise to pick one from the "Business" line of products (Lattitude), instead of the "End-User" line (Precision).
Vostro, Latitude and Precision are the business line laptops (in increasing order of build quality / reliability). Inspiron, XPS and Alienware are the end-user / domestic lines (again in increasing order of build quality).
Time is nature's way of making sure that everything doesn't happen at once. Space is nature's way of making sure that everything doesn't happen to you.