Satlook lite -> spectrum, S/N, BER, USALS and NIT -> 160 GBP
Satcatcher Digipro IIIS -> spectrum, C/N, USALS and BER -> 225 GBP
What Satelliteman said -> spectrum, S/N, BER, USALS and NIT -> around 290 GBP
Satlook Micro HD -> future proof -> demodulates DVB-S2 transponders -> spectrum, S/N, BER, USALS and NIT -> around 440 GBP
To get any big advantage over these you would need a big step up in budget.