The Lee is a superb press. I do not own one personally, but know of many who have. The only two complaints I have heard are that you have to use lee 1 1/4" dies and the press could be a 1/2" taller to make it easier to use.
The corbin is the end-all press, but it better be for 750 smackers and there is a waiting list.
Many shooters use the ammomaster and have posted very respectable groups at matches. I think the dies and shellholder are more important than the press is. M2 precision makes the best dies and also I think Mike still makes hand dies if you can find an arbor press solid enough to use them.
"We don't rent pigs"