The last on the list only has onboard graphics. So I'd bin that one.
Chillblast has a micro case so upgrading might be a bit more difficult. Better PSU and CPU but the most expensive.
Dino has a good sized case, slower CPU but cheaper than Chillblast by about 40 squids.
I'd go for the Chillblast one. That's my preference though.
Have you thought of buying a tower only? If you have a monitor, keyboard and mouse then a Tower only could give you a better specification PC? You could upgrade the monitor at a later date.