I have both. I have cooked with the DX2 many times and it is awesome. One of the best investments I have made for long cooks.
I recently purchased the Party for use when I don't have electricity or need to run another smoker (without the added cost of another DX2). That and I was curious to see how it worked. I have only used it a couple of times but it worked like a champ.
I don't think you can go wrong with either one but I like to plug in the DX2 and not have to worry about batteries.
[COLOR=darkgreen][COLOR=black]LBGE,[/COLOR] [/COLOR][COLOR=black]22.5 WSM, 14.5 WSM, Weber 26.75 OTG, Weber Performer Gold, Weber Performer Silver, Backwoods chubby, Speed of light fast [COLOR=darkgreen]Packer green[/COLOR] Thermapen, Speed of sound fast [COLOR=red]red[/COLOR] backlit Thermapen, Ultra-fast [COLOR=black]American flag[/COLOR] Thermapen[/COLOR]