Roy Gandy was joking! Ivor was not...
Lots more reading in a thread here:
http://www.stevehoffman.tv/forums/sh...d.php?t=122485
The gist of it is, a vacuum machine is the only way to get a record as clean as it can be, all records should be vacuum cleaned, even new ones, and if you don't use a vacuum machine you aren't hearing your vinyl to anywhere near it's full potential. Silent playback can be achieved, zero hiss, cracking, pops etc. But only with a vacuum machine.
That's the consensus from sources
I trust, at SHF and elsewhere btw, not just my opinion.
Make up your own mind, but it seems about as logical to me to buy a brand new vacuum machine for a measly stinking $150 or so (which cleans equally as well as a $1000 unit btw, it's just fully manual), as it is to try getting a good fit with IEMs . You don't "need" a vacuum machine or a good fit with IEMs if you have them, but it makes sense to if you can. As others say, it's a no brainer.
If you believe that a machine makes no difference to the cleanliness of a record then that's fair enough, good for you!