question about multi tabling

how do most of you guys play more than 4 tables?
two monitors? one monitor with all 8 crammed onto it, or two seperate computers?

looking to make the next step up which is to double the amount of tables i play. and im stuck between getting a laptop or a new graphics card + another lcd.

tho i am leaning towards a laptop since BW says you need a seperate computer to play on empire (as i have party on my desktop)

any input would be great, ya know, gimme some pros and cons with the situation(s)