Kabuto, Gaara, Naruto...
the only Genin team which could possibly take on any of the Jounins, including Itachi and the legedary three...
seriously, Kabuto tied with Tsunde alone, which means that at worse, he's a bit weaker than Jiraya and Orochimaru, add to that two demons who are able to call\transform into giant monsters, and you get quite the kill-team...
besides, Kabuto has his medical jutsu's to weaken his enemies, Gaara has layers of absaloute defences, and Naruto will just get up everytime you hit him, which means they are really hard to kill as well as they are super strong...
for tactical descions they have Kabuto, who as a spy, probably knows a shit or two about life, and even though Gaara and Naruto usualy fight alone, it seems that Naruto is capable of following orders and since Gaara has done A-ranked missions, i think he also know when to listen to others...
No matter who's up against those three, the outcome is usually death to thier enemies, wheather it's a genin team, a jounin or even one of the youmas, this team wins.
if a forth person is needed, then i'd put in Neji or Temari, Neji has the close range field covered while Temari has the long range attacks, it doesn't really matter, since if the three above couldn't beat the enemy, it's not likely neither Neji nor Temari could help...