If you really desire 160-2 meter radio the 746 Pro is hard to beat, the none pro was also a nice radio but by the time you end up finding or buying extra crystal filters that brings up the price of the none pro so with the Pro you have an unlimited arrangement of very good DSP filtering plus excellent noise reduction which was a big improvement over the none Prop radio. There were some with some transmitter issues but a call to Icom should give you what serial number batch in which they fixed that issue.
As far as the radio it cover six and two meters as well as HF and both the transmitter and the receiver kick ass on the dumpy Kenwoods 2000 which may give higher VHF/UHF bands but that radio was like trying to place 10 pounds of crap in a 2 pound bag, it has the worst receiver and on transmit there are a few in my area which when they go on six meters they take 10 khz up on SSB, very poor IMD issues with that one. Maybe if your into ESSB that might be what some want at HF but 3Khz is all you really need with good SSB communications.
Yes on HF and six the 7300 is better but you end off leaving two meters off that radio plus its gonna be by rebate time around $900 were a decent 746Pro should run between $500 to $600 tops, yes there are some that want up towards $750 but basically they will not sell at those prices.
I have had two different 746Pro's one was bought back in 2006 and I sold it in 2010, then I came across another one in 2014 sold that one in 2018 with also a 7300 plus a Yaesu FTDX3000 plus some cash to buy the 7610, I am still kicking myself for selling that Pro, I should have kept that puppy as a backup but have today a 7300 for that. Yes the 7300 RX side is hard to beat but the 746Pro was not bad.
Icom has since came out with there DC to light rigs like the 9700 but not everyone wants DC to light radio, if they added just 2 to an existing 7300 and maybe just a few more features that would be another killer radio but the Japanese Marketing doesn't think the way we do.
When I had my last Pro and the 7300 side by side the CW selectivity in the 7300 was better but the 746 was not bad at all, just that the 7300 was better, on SSB at times yes the 7300 was better but hear again the 746 did a good job but the DSP technology that the 746Pro had in it was very good for its day and a head of the curve for its time.