You are going to get 50-50 with this thread but hey.. Here we go.
I was on ITA 4.50 then 4.65 and never had issues, apart from a few freezes. Since I PS3 corruption occurred I had to restore so I asked around and ended up deciding to go with 4.70.1 D-REX and I feel its a more well rounded FW. Seems proper and professional, no freezing, full Rebug Toolbox compatibility and so on. I would suggest Rebug 4.70.1
I use to despise Rebug as 4.65.1 and .2 decided to never do what I wanted but 4.70.1 seems perfect so far...