there are several parameters to consider when determining the performance of a receiver but the two most commonly referred to are receiver sensitivity and selectivity.
if we restrict the answer to cb/10m rigs then in these respects there are only 5 that come to mind....
Uniden Cobra 148GTL
Uniden Grant LT
Uniden Grant XL
Selectivity AM: 6dB @ 3KHz, 50dB @ 9KHz.
Selectivity SSB: 6dB @ 1.1KHz, 60dB @ 2.3KHz.
two other rigs with receivers that met or exceeded these specifications were:
Uniden HTX-100
Stoner Pro 40
somewhere i have a color filter bandpass curve of the receiver in the HTX-100 in comparison to the HR-2510....if i can find it i'll post it. needless to say, multiband export models don't come close in the selectivity department. you'll notice that none of the models listed are of the multi-band type. there's a reason for that.
as you can see the selectivity in the 2510 receiver is as broad as a barn door when compared to the receiver in the HTX-100.