I'll concede that the Junsi is slightly more 'elegant'. But the noise doesn't have to be an issue as the fans on the server supplies can be turned down very easily. As for amp and voltage readouts; well I guess that's 'nice' but I cant see any real practical use, for powering a PL8 you would just turn it to 24v and never adjust it again.
The server supplies also provide two voltage output, one at 12v and one at 24v, so you can use low and high power chargers at the same time, that's something the Junsi I don't think provides?
Anyway the real advantage is the bang for buck ratio. Both types have pretty much the same basic specification but the server supply type costs about $25 and the Junsi about $300.
If money is no object by all means get the Junsi (or similar), but if you budget is limited the server solution saves you $275 which you can spend on something that actually adds to your enjoyment of the hobby.