You can disable all the nagging around the UI. My version looks almost exactly like 2.x
I would personally recommend Halite, if Eóin still kept working on it. As it is today, it is at a disadvantage because it doesn't support as many features as the others. Plus, it looks pretty snazzy. The competition tries its utmost to be the ugliest option available. At least we're still much better off than a couple of years ago, when both Mac and Linux roundkicked Windows' ass when it came to the number of options available. Now they just simply kick its ass.
BitTorrent is a dead concept, made with centralized trackers in mind which has been proven a very bad design idea.
Indeed, DHT seems to be faster locating peers than most trackers. A torrent directory is not the same thing as a tracker, though
. ed2k and KAD still have the upper hand when it comes to decentralization, but they're working on solving that for BitTorrent. Are both networks still having enough activity, anyway?