John Spencer (and a few others I think) had a good outing with the Caster at the Neo this year - a most excellent report of which can be found
here.
1/8 buggies can take a lot of abuse compared to 1/10. If you're planning on racing then you will find more competition in 1/10, but 1/8 is becoming more popular. My own club (Stotfold) will allow 1/8 brushless, for example.
Hope that helps.
