Optiplex or Dell R210ii

I am doing some upgrades and a big part of that for me is aesthetics and future upgrades.

I currently have a couple 7020 I5 Dell Optiplexs but I am thinking about purchasing a couple Dell R210ii.

Is this a crazy move? I love the idea of a small 1U rack mount server and plus they are cheap. I can pick them up for $150 while I would be paying $150 alone for a chasie.

Is this a crazy move?