New Speedo: Reventon or Vortex..?

[Dr_UpGrade]

Hi Guys,
Am in the market for a new speedo and currently looking at either the Orion Vortex or the Speed Passion Reventon Pro. Its for a 2wd and looking at boosted type power settings for say between an 8.5 and a 10.5. With maybe dropping down to a 6.5 for my 4wd on occassions too.

So any thoughts and opinions on which is better and why? Seen some good deals on the Reventon pro + motor around at the moment, or do I only splash the cash on the orion Vortex on its own?

Cheers,

Mark