Looking to purchase a Mig welder

[DaveO]

Here's a clip from the IMIG manual (just citing the source, not saying "RTFM"):

Arc Force Control: This feature allows you to change arc qualities. When used in MIG mode, it helps to control wire burn back and stick out. These two factors help in start/stopping activities such as spot welding. When used in Stick/MMA/ SMAW mode, increasing or decreasing the “dig” can make the arc crisp and sharp or soft and buttery. This is helpful for making quality welds in and out of position. Some experimentation may be required to deter-mine the best setting for individual tastes.

I've been reading up on pulse MIG and think I've got a general idea, but not enough to explain to someone else. Lincoln gives an explanation here:
http://www.lincolnelectric.com/en-us...ig-detail.aspx

As with any purchase you have to decide if the bells and whistles are worth the additional cost, and whether you'll be able to take best advantage of the feature. To me it's telling that both Mike and Mark (technical mods here on this forum) would do without it if given a choice of machines.
http://www.everlastgenerators.com/fo...05-Pulse-info?