ive had two escos's now and me i would go for a big turbo lux in the best condition possible rather than spec as its easy to tune later....

but ive found they are abit boring untill they are around 370/380bhp then they come alive and a must is better brakes as the 4x4 brakes are shocking .... and i mean pants....

a good spec to go for is
group a gasket and breather
t34.55
greens
3bar
good exhaust and air filter

then get it live mapped by nms on a stage 3 gunship its a great conversion