You are off to a great start with a slash. Fun truck. For tools, I would grab quality hex drivers like Hudy. They make a HUGE difference when it comes to getting those tiny screws out without rounding.
The battery may be a bit of an overkill. Check out these packs:http://www.valuehobby.com/power-syst...city_range=180
Thunder is a nice charger for the price.
PS stay away from excessive bling with the Slash. All I use are aluminum castors, shock caps, RPM clutch cover and arms. The RPM offset compensating arm lets you run rear tires all around.