A good way to get information on the series is to go to wookiepedia, has heaps of information on things, earlier this year I got a bit of an interest (slight obsesion) and just kept going through things to find out. My favirout pieces were on the sith, and some of the other force sensitives, didnt realy memorise it all but I took note on some of the interesting points. I also had an interest on the Mandalorians as a whole, how they at one time had the universe by the neck and if jedi hadn't stood against their own teachings it would have been controled by them. Later on the home world was diminishing and a lone Mandalorian kept up some of the traditions as a bounty hunter (Jango Fett), and ironicly an army to protect the Republic was populated by mandalorian clones. A interesting note is that many of the clones actualy practiced some Mandelorian customs, and some even retired to the home world. Boba actualy ended up becomeing Mandelore who is the leader of the Mandelorians, and aparently has a nack of getting out of seminglessly impossible death situations. I think that they even ended up becomeing a formidible force again.
Well my idea of Sideous choosing his plan is that, he always loved the obidience of droids, of course droids can not do some things liveing beings can, and the clones fit his wishes of perfect soldiers. Also Possibly the death star was an attempt to try and match some of the older sith in power, and strike fear into the hearts of those who opose them, as fear is one of the best forms of control by a sith.
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Through dream I travel, at lantern's call
To consume the flames of a kingdom's fall