First - thanks everyone for your helpful comments.
Right now - at 2 AM, I am at Moscow's DME airport. I decided against the lounge on the return leg of my Central Asian trip. Following these steps will get you easily to the international boarding area - with no need for a Russian transit visa.
Immediately upon de-planing, follow the yellow signs indicating Transit/Transfer and go upstairs to the Transit check-in counter. Friendly staff will ask to see your continuing journey's e-ticket, and importantly, the tag that was issued when you initially checked in your luggage. They will transfer your bag for you onto your connecting flight and issue you a new baggage claim slip. You will not be able to access your luggage at this point, so be sure to pack your carry on bag wisely - likely for a good 8 to 10 hour layover. Once this is accomplished - about a 20 minute procedure, you are directed to Passport Control - an effortless one minute check. Afterwards, abracadabra - an opaque glass wall opens for you and voilà - you enter the international boarding area.