Join Date:Joined: Dec 2010
There are various great customizable launchers for Android 4.2 like Nova, Apex, Next Launchers.
I myself run Go Launcher EX in combination with Go Locker, Go Weather & Go Toucher, which runs perfectly smooth & fast and just does things i cannot do with Apex or Nova (Like removing status bar & docks) and other things. I didn't experience lag or ram dropping rates.
You should try some out and see which one fits your needs.