Need opinions: FlashCom Vs. XML Socket

I'm researching the world of gaming and thus far I have to candidates: Flash Communication Server (1.5, or 2.0 Media Server), and XML Sockets.

I successfully deployed XML Gateways using a modified version of the default ColdFusion XML Gateway. For my purposes, both are working fine.

I'd like to hear comments on why I should decide on one or another… here're some queue points: price, scalability, reliability, and deployment time just to name a few.

FlashCom is way more expensive; even paying CF enterprise licenses. On the other hand, FlashCom has built in HTTP tunneling, allowing XML sockets to penetrate large corporation's packet filtering.

Both can be easily clustered. I have no benchmarks at all, but I could guess that FlashCom will handle load better.

Please provide your opinions; I'm hiring consultants on this topic, so expect to see more on this topic soon.