Which transistors should i use?

Being above the maximum (5V), you can be sure that this way, the MOSFET will be turning fully on and off each time it is switched.

outsider:
@ted:
it would conduct but RDS(on) would be pretty high,

not sure about that.

Being above the maximum (4V), you can be sure that this way, the MOSFET will be turning fully on and off each time it is switched.

google - Vgs(th) min/max .