Missy, I think you probably punched in the wrong letter making me think that it is mV instead of mW. Watts = voltage * current, and Voltage = Voltage.
If you haven't made a mistake, then I'm still for #2 :lol:
If I were to be honest with you, I can't give you a true answer upfront because I don't know what is required in a transmitter you consider optimal, but here are some things to consider:
Wideband and Narrowband are two basic descriptions of bandwidth.
Wideband means that more channel space can be picked up at a time. This is good for audio broadcasting, and high speed data transmissions. The drawback is that if you are transmitting in the FM band, you could jam some signals that are several Mhz below and above your transmitter frequency, provided your transmitter is strong enough to reach the receiver.
Narrowband can partially eliminate the problem because Narrowband transmitters occupy less space. I think they are only useful for small data transmissions, or basic morse code.
I think crystals make transmitters or receivers more stable, but I have never used one yet.
Which is 'best' - a skate board, or a large truck?. This is the sort of 'nonsense question' you've asked!.
A large truck :lol: j/k.
As for you missy, if you need to make a transmitter and you are stuck, tell us what you have sone so far, and then we can help you.