Good pc's?

hi guys. i'm gonna build 2 pc's in the future and i wanna know what you guys think of it.

i got a gt220 for the xeon pc.

business pc's. xeon is the main pc, hope they do for 8-10 years.

tasks: excel, word. typing, storage and some other programs like excel.

it's overkill but he wanted to buy a dell  pc for 1100 euro excl btw. it was on sale for 950 euro excl btw. (optiflex 9020 small form factor).

What are they for, Editing, Gaming, asking me for my thoughts alone isn't a good idea!