One more option is The TeamMagic G4S ,check if anyone stocks it in your area.I moved from Serpent to TM and must say I found car to be smoother and easier to drive fast.
The 720 is a option that would look at also ,Serpent make good cars.
In the 200mm gas class your options are basically
I wouldnt suggest anything else for racing ,then again you never know.
Which ever car you go for ,support is the key to having a good car.
casterracing EX-1 Pro, SP Silver Arrow
TOP Racing Scythe, SP 17.5, SP GT Pro 2.0
TOP Racing Scythe, SP 4.5 V2, Hobbywing Xerun 120SD 2.0
TOP Racing Scythe, SP 13.5, Hobbywing Xerun 120SD 2.0