That 540ML is an impressive cartridge. When I installed one, it had me going through my entire collection all over again. Right now I'm breaking in a Nagaoka MP-500 and it isn't grabbing me right away like the 540ML did. Now the MP-500 needs about 30 hours of break in and I'm not quite half way yet. I'm not going to compare them directly until then. I hope it improves as much as they say it does as it was quite a bit more expensive.
As for the 750SH mentioned above it's possible that you may prefer the 540ML. I find the Shibata stylus profile doesn't give quite as much of the clear, sparkling highs that the Microlinear does.