I'm just getting back in to the hobby after 10 years and need help on servos.

so far all 3 cars are setup with the same electronics (muchmore fleta esc, motors, lipos, and ko propo kr-408 receivers).

Just a few questions..

1. Should I go with brushless servos?
2. Most servos are rated at 7.4, but lipos are 8.4. So what servos should I be looking at.
3. I'm currently looking at Protek RC 160SS low profile - Thoughts?

The 3 cars I will be using them in are Tamiya evo6, TA05v2, and TRF101W (F1).

Thanks in advance.