The 3030 could benefit with PIN diodes in the front end, but all-in-all
it's a decent receiver with good selectivity filters.

The SW-2 has decent filters but I found the 6 kHz AM filter to be a bit
wide. The encoder will eventually give you trouble.

The R-30C should be a decent receiver all around if they ever fixed the
unstable IF and the huge amount of birdies it had.

Frank