im with kumar and the other 50% of the divide on Task Killers im afraid lol I dont use them and with the DHD on 2.2, it seems to do a pretty good job in maintaining apps. dont get me wrong due to some apps ive installed, not managed automatically well, but hey, i havent noticed it too much over the past 4-5 or so months.
I have 3G watch dog too, but hey, everyone has their preference like chomp or handcent lol