Welcome aboard fellow VX owner!
The speedo thing is a common issue with 5th gen Hondas. First thing to check is the VSS (Vehicle Speed Sensor). It's located on the back-top (towards the firewall) on the transmission. Check for any corrosion on the pins on the sensor itself and the harness plug that goes into it. After cleaning it, if the problem persists, remove the instrument cluster and check the plastic printed circuit board on the back for any cracks in the traces. If all else fails, you can get another speedo cluster off of Ebay and then swap in just the speedometer portion into the VX cluster.
Hope this helps.
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