Dedibox 2016 XC, SC and KS-1, Which worth to keep for long term?

With luck and patient, I am manage to grab a XC 2016 last night (they tend to have one available each day).

I was going to keep both SC and KS-1, but now I don't know which Dedi I should keep for personal usage (owncloud, small site, VPN, remote backup, VM testing etc), all three are so rare to catch..

Please help me to decide.

Specs recap
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Dedibox XC SATA 2016 €15.99
Intel C2750 2.40GHz
16 GB
1 x 1 TB
2.5 Gbps

Dedibox SC SATA 2016 €8.99
Intel C2350 1,70GHz
4 GB
1 x 500 GB
2.5 Gbps

Kimsufi KS-1 € 4.99
Intel Atom N2800 1.86GHz
2GB
1 x 500GB
100Mbps