My first reaction is that I'd second ineedaclutch.
The money you'd spend....odds are, in a couple years (or less) you'll be sitting there going "why did I spend the money on that?"
Projects are cool and fun, I've had a few myself....and I've sat there a time or two wondering why I spent some money. Live and learn.
If you really want to do it, I'd go into it knowing you're not going to get the money out back of it (because of "upgrades"), and then there is overall kit re-sale.
Your kit won't get any more money because of DC hoops, and different lugs. People just don't care on mid-line gear, and if they are looking at higher end gear, they wouldn't want a Rockstar with what you'd consider upgrades for yourself.
NOT that a Rockstar is a bad sounding kit, it's just consumer reality.
I'm sure you are considering this, SO, if you're going to keep the kit, it's right for you, then go on and have fun!
I'd try one drum with DC hoops on it first. Maybe borrow some from a friend, or take the drum to a shop you'd buy he hoops from.
Make sure you like the sound the drums make with the heavier hoops BEFORE dumping a bunch of money on something that "just looks cooler" or "more pro".
Finding lugs should be easy enough. Just measure from hole center to center, and get lugs that fit. There's a ton of different lugs these days.
Good luck!