Lol... Well, here we'll simply have to agree to disagree. I've always loaded 'vanilla' 103s (the R and some other models are different) at 100ohms, and it's never failed to sound superb. Think about what Denon's own (fixed) SUTs, designed to be used with the 103, load it at... Yup, 100ohms! And that's no accident either
There can be some advantages, in my experience, depending on the sonic synergy of the partnering phono stage, to load it slightly higher, at up to 250ohms, but 1000ohms, sorry Alex, not for me.
However..... At the end of the day, if to YOUR ears in YOUR system it sounds best loaded at 1000 ohms, or in Neal's case, 330ohms, for whatever reason (as achieving optimal cartridge loading for SONIC, not merely electrical purposes, is somewhat of a black art), then ultimately that's all that matters!
Marco.