Which Brushless System? Novak Havoc Pro or Orca?

[JBL]

Which one on these speedo is best, the Orca with a 6.5t are about £132.99 without the data card and a Novak Havoc pro with a 6.5t is slightly more expensive. I understand the orca has a turbo function that needs the data card that is another £40.00 to spend?

Can a Novak ballistic motor take a build up of heat? due to me running a mid mounted xxxcr with a vented shell?

Let me know your views, please.

I feel I need more speed, my current speedo is a LRP SPX zero with a 8.5t limit and I run a 8.5t x12 so the speedo is at its limit, but has never let me down...