You can find the T-110S around for sale. The S is supposed to stand for silent but I never owned one.
OP asked for modern, not "already outdated by late 2014 technology standards".
Both the S5 and the Spondoolies "rockerbox" based machines blew away anything Bitcrane made.
For "winter use only electric sorta-portable heater" usage, any miner will work.
He asked for 1W per Gh @ around 1000W, with a big requirement for it to be quite so I gave him what he asked for. Only other options is Avalon 4.1 or if he wants to mess with water Antminer C1.