betty.k,
Make a Serpent 710 better!

Not an easy task,I have a freaky engine on order for the 710.That is about as good as it will get.
The Serpent 710 and 960 are among the elite of on road cars,some "upgrades" can look great but will not improve performance at this level.
My 710 is all about the most go and least show.
payaso,
You want and on road team Associated has a pretty good selection,and even a RTR that is great to set a foot in the on road nitro world.Great all around car.Much simpler that the pro level cars...
For top performance you have Serpent(710 and 960),Kyosho(V-One RRR and Evolva) and Mugen. My next money pit will be the Serpent 960...what a beast this one is with the proper engine.
You need to have a serious on road track to really exploit these road rockets,not bashers cars.
And above all what kind of part support you have from a local hobby shop? Me I am lucku to have a HUGE hobby shop (Udisco...Udisco.com)just a few minutes..walk from my place.They are Serpent experts,and one guy there races a 710/950 and is a local champ.
So Serpent is damn well supported locally.