Veritas Cluster vs Oracle RAC for HA

I'm looking into building a new 9i RAC cluster mostly for HA reasons and the flexibiltiy that RAC offers instead of the traditional hot standby setup I've been doing for years with Veritas Cluster anyone have good or bad feed backs when comparing the two ?

4 Node RAC Cluster vs 2 Node VCS Setup

The setup would be something like

4 - Sun Fire 280R - Oracle 9i RAC
vs
2 - Sun Fire V880 - VCS Cluster

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