SOA: Biztalk ESB candidates for .Net [closed]

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Letting BizTalk aside - I like it, but only for variety purposes.

Which others ESB solutions would you use in a SOA .Net arquitecture?

thanks in advance : )

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We are using nServiceBus in a SOA system so far the results have been good. The biggest hurdle was understanding what SOA means. We followed Udi Dahan's definition and guidance on this.

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MassTransit with RabbitMQ works for me.