I've hand my hands on many receives. from tube based to modern SDR's and still by far, the best reciever i ever owned and used was the winradio 1000i - i still own it, sitting in a long dead isa machine. hoping some day i can make it work again. simply it could pull out signals were other receivers were deaf, or would loose the signal in qrm or noise, it had an amazingly low noise floor..and would go from DC-dailight (0.5-1300 MHz) which for 1979 was amazing ... just an awsum peace of gear.
I am thinking that possibly your memory of this is a bit clouded by time.
I have owned several WR1000i's, in fact I still have one operational, in a working computer, and a second in a bag. This receiver is what made me switch from Mac to PC back in 1997, I wanted a WR1000i but they would not work with a Mac.
Since then, and today, I have owned many pieces of WinRadio gear, the WR1000i, the WR-1550i and e, the WR-3550e, a few different G303/305/315's, the G31DDCe, G33DDCe, and I have used the G35DDCi and G39DDCe. I like WinRadio products, and the WR1000i was what set the hook.
However the WR1000i was/is really a ho-hum radio, particularly in regards to HF performance.
Yes, it is wide banded (the US version was cell blocked), and yes it is "all mode" (all mode in this case being AM, FMN, FMW, and SSB), but the filter selection is abysmal. It does NOT have discrete USB/LSB, but rather has a BFO. The BFO Offset control is in the upper right corner of the GUI. It does not have a specific CW mode, rather you just use the SSB setting, with its relatively wide filters. It has a single filter it uses for the AM and SSB selections, and of course that means for CW also, but at 6 kHz width (at the 6 dB points) that is VERY wide for SSB, and a positive Grand Canyon for CW.
You are right, it is pretty low noise, particularly on HF, but that is not because of excellent LO design or low phase noise, rather it is a result of fairly mundane sensitivity.
It was not much of an HF receiver, but it was a fair to good VHF/UHF scanner.
For its day it was ground breaking in features and capability, with OK (but not great) performance. It suffered many of the same issues that other DC to daylight rigs had, poor selectivity, intermod (although not horrible in this aspect), so-so dynamic range, and such. It was a "jack of all trades, master of none".
Also, not sure what you mean by "DC-dailight (0.5-1300 MHz) which for 1979 was amazing" For 1979 this would have indeed been amazing, but the WR1000i came out in 1996, and by that time there were several receivers with similar or wider operating ranges. For example the Icom R8500 came out the same year, much wider bandwidth and better performance in almost every way, of course at a higher price point. Several wideband AOR models were also out.
Of the many receivers I have owned, and do own, from tubes to SDRs, I would not place the WR1000i in the top 10, probably not in the top 20. For the day it was incredibly versatile, it showed the way radio could possibly go, and it was fun. But it was not particularly good. Not that it was horrible, just not great either. I will say it changed the way I looked at radio though, accepting for the first time that hobby radio could possibly be better without knobs and large receivers.
T!