Hi, I cant give you much information on weather VSA would work in this particular configuration but I'm sure one of the VMware VSA team will help here. I can however suggest the requested "other options".
You may want to take a look at SvSAN from StorMagic. We've developed our VSA solution specifically around multi-site and remote site environments. With the configuration you've explained - ie 2 server configuration with vCenter off-site, this is feasible and we have several customers doing this already with 1 - 2200 sites with only 1 - 8 vCenters. The amount of Bandwidth you need isn't the factor here but rather the line latency. With SvSAN you require 1 second or less but in fairness we have some customers with line latency of 2900ms running with out issues.