I recently was planning a trip through SVO for about 48 hours. (I had a friend who was flying through moscow and I would have been able to stay with him for free. I was also on my way home and a ow ticket routing through moscow was rediculously cheap.)
Problem is also that cab from airport to city is about $100USD and getting a visa, either tourist or transit is a pain in the you know what. Both cost the same amount and take the same length of time to process. Only difference is that transit is only valid for 3 days while tourist can be valid for much longer. What makes tourist visa different is that you do not need a letter from a travel agency (which also can cost over $50) rather a ticket and itenerary showing method and time of leaving russia is acceptable.