get one thats been looked after well rather than price or mods.
Also coming from an FRP you will find a standard escos is much faster in a straight line, but the FRP will carry higher speeds through the corner and is more nimble on tighter B-roads.
Not saying the escos doesnt handle, it does its just that the FRP is very very good for a FWD car and as standard comes with suspension that is more track spec than road as standard.
decent suspension and uprated bushes and an escos will handle great though.
keep it stage 3 or below otherwise you will start killing transmission componants if you drive it hard or go on track. All the transmission problems are easily fixed with uprated componants just it isnt cheap and hence where cossies start to become silly expensive.