Hi guys. I'm looking to purchase some headphones that can provide me 7.1 surround for watching movies late night when I can't run my full system. I've been reading mostly good stuff about the Sennheiser RS line and I was going to give those a try. I really would like some kind of surround sound in the headphones and in investigating the RS175 vs the RS185, I noticed that the 175's list that they have virtual surround sound but the 185's do not. This didn't make much sense to me so I thought I'd ask here. I was ready to purchase the 185's last night but then noticed that missing in the 185's spec. I'm looking to pull the trigger on one of these today. Help would be appreciated! Thanks!