if you want to improve your SH skillz, i would suggest no more than 2 tables. i think ping is right to suggest that you have to look at players AND cards, and 6max can be fast action, making 4 tables difficult to keep up with and still maintain your best play. i like to start with 3-4 right away, to see which tables i like, but i usually end up moving down to 2 unless i am fortunate to find 4 great games going on at once. also, if you do go 4 tables, make sure you have high enough screen resolution so that you can tile them with small overlap. if you only have 1024 res, it can seem like you're on a Geocities website with all those goddamn popups...