RE: which short course?
If you want (IMO) the best combination of raceability and durability get a Blitz. I have one and an E-Firestorm and I know they're tough. My friend has a Blitz and races it, with a few steering mods and some traction compound he wins most weeks and never breaks. He races against a lot of SC10s... (He is good and would win with an SC10 too)