They are all so good at this point, pick your favourite color.
If you're in the market for something new, probably best to go with a chassis made for 1S, as that is the defacto setup these days.
Choices...
Serpent S120; Dead Sexy, it's not a copy if it's orange
XRay 12 Link; Precision parts, oh so familiar look.
Team Associated RC12R5.1; Durable workhorse, parts available at your corner drugstore.
CRC Carpet Knife; Hot little Red Head
BMI DB12RR; Tried and true design, also a throwback to the Agitator design from the early 90's
Corally 12SL; Dutch for 12th scale.
Speed Merchant Rev V; Links and Light
Did I miss any ?