I'm actually still running one of those old G8 Microservers, though I swapped the crappy Pentium for one of the Xeon parts. I've looked a few times and I still haven't found anything that would be a good replacement.
The Microserver G10 Plus is not too bad. Replaceable CPU, iLO option, half the size of the G8 (though external power brick)
The regular G10 one is pretty useless obviously. Soldered AMD CPU, cheap design etc. No iLO. It's more of a home entertainment thingy, nothing enterprise-class at all.
I agree I'm looking for something lower power too. I have three G8's but they are each doing 50W idle so I can't run them 24/7. And this is with the lowest-TDP processor that is available for them! (E3-1220Lv2, 17W TDP). The iLO alone is consuming 5W even when it's off.
I'm not sure how much power the G10 Plus draws but I haven't really considered it. It's too expensive still (I bought all my G8's for 175-200 euro each and 2 of them even had a 60 euro cashback on top of that!! So I barely paid more than 100 for them brand new. Crazy cheap pricing for a well-built 4-bay server. Each of the drives inside them cost more than the server itself :)
But 15-20W I think is very ambitious with 4 3.5" drive slots. 30W would be doable I think.
