[ICOM] Icom 740 vs 751A

[John G.]

I am looking at a fully loaded Icom 740 for what seems like a decent price.  It has 2 CW filters, mechanical 3rd IF SSB filter, keyer, ect.  For the price one might also be able to find an Icom 751A.  How do the receivers compare in these two rigs?  Is the 751A a much better rig than the 740?  How does the NB in each one compare in taking out line noise and stuff like that?

73 John AF5CC