neilCC wrote: I... ...thought that I'd get better espresso from a "good enough" grinder with a good home HX machine rather than a super grinder (M3) with a Silvia.
1st-line seems to confim my thinking on that:
I think you're taking a bit of that out of context. I'm fairly sure that he doesn't consider Silvia one of the "lower end" machines.
Spending $1400 on a great grinder and using Silvia to pull the shots will get you great espresso. Ask me about my Silvia pulling shots out of the Mazzer Major compared to the shots pulled on my $7.8K, fully plumbed, automatic two group, rotary pump, HX, fourteen litre boiler, 4300W absolutely pro machine fed by my Rocky.
I'll give you a hint: The rocky is good, the Mazzer is great. Ready? GO!
*BUZZZZZZZ*
The stuff out of the Silvia fed by the Mazzer is dependably stable and really great. The stuff out of the Astoria with the Rocky feeding her is trickier, and occasionally great, but fairly dependably good.
I'd double the suggestion to get a used Mazzer (or something else equally bullet-proof) and spend the $40 on new burrs. I'll sell you a new hopper cheap, if ya need one, and a lid. Don't want a doser? I'll sell you a mod for almost nothing, and so will a coupla other folk.
Excellent grinder, around $300-is, and $1.7K leftover to play around with. You could do worse than a Silvia and a grand worth of toys! (I'd keep two or three hundred for tamps, shotglasses, frothing pitchers, brushes, cleaners, descalers, spoons, cups, etc.)