It is not necessary to use an ultra low noise GaAsFET transistor on 2m for satellite work because the sky noise at 145MHz is approx: 2Db. The exception to this is EME (Earth-Moon-Earth) communications where an 0.6Db or better preamp is an absolute must due to the extremely weak signals.
Only use a preamp if it's necessary. Don't confuse LOUDNESS with a better quality signal. Remember, the pre-amp will amplify the NOISE as well as the wanted signal. That’s why your pre-amp should be mounted at the antenna... to compensate for the loss of signal and NOISE in the co-ax.
You should try to use good quality co-axial cable. This matters more at the the higher frequencies but *anything* you do to improve your RECEIVE system will pay dividends and the simplest (and cheapest) solution is to use decent antennas and cables!.
Spending money on better antennas makes more sense than spending it on pre-amps. As the old saying goes ‘Aluminium is cheap!’