I know this is an old thread by now, but I do have the Sumiko Pearl and wanted to give some comments on it. It is clearly a better cartridge than the OM5. In my opinion it is even better than the OM20, which I used to own (now the OM20 is no longer made, Ortofon has replaced it with the 2M Blue). The Sumiko Pearl has a fatter, richer and more full bodied sound, and it tracks better on worn out records and is more lively and musical. I found the OM20 to be relaxed and smooth on the ear with a large-than-life soundstage and excellent imagery - and while the Sumiko doesn't give the same expanded and room filling soundstage, the overall sound of the Sumiko is to me more pleasing. I use mine at 2g force, in my system this works best.
The Shure M97ex discussed here is more warm and laid back than the Sumiko. Shure isn't for me but can be a nice cartridge for others.
AT-440 is lively, upfront and a bit on the bright side.
Ariston Q was a nice turntable in it's days.