I have/had all of them except the Drake SW1 and SW8. However, I have had the Grundig Satellit 800 which is the same radio as the Drake SW8. Let’s start with the least desirable IMO, and work up
SW-1 according to several reviews, this was the lowest quality receiver to wear the Drake name. I don’t recommend this receiver
DX-394-I owned one when the B model was first introduced. Selectively was non existent. With the less crowded SW bands today, it is making a comeback of sorts. Still, I would not recommend it personally
DX-302- Not bad. Think of it as a Yeasu FRG-7 with a digital readout. In fact the circuit board is almost identical to the Yeasu. Main issue with this radio is the main gear in the tuner gear train often gets brittle and cracks. You can replace it with a common RC car gear, but this repair involves removing the entire faceplate
SW-8- Same radio as the Grundig 800 in a smaller case. Lacks some of the features of the 800, but overall, a nice radio.
R-70- An excellent receiver that can be found at bargain prices. Main complaints with this receiver is the quirky tuning at band edges. This might take some time to get used to. Performance is excellent
R-71- For a long time this was the defacto standard against which all other receivers were compared to. Used by several government agencies. Main issue was a volatile operation firmware that was backed up by a soldered in battery. When the battery died, the radio literally lost its mind. Then later there was aftermarket memory backup boards that contained the operating firmware permanently burned into non volatile memory chips. I would have no problem recommending either the R-70, or R-71
Another desktop you might want to consider is the Tecsun S-2200x. This one is in your price range and is new using newer digital signal processing technology. In fact, I have just in the last couple of weeks sold my Grundig 800. I am planning to replace it with a new Tecsun S-2200x
B.S.