in my opinion, get a vw polo,easy to modified engine, tsi maa...hehe...it is also very comfortable. it is very fun to drive, have the decent power if u need to lantai the pedal.
the last choice in the list will be the ford focus as it looks too girly and crz for being too racing look but it is such a slow car, yes it handles good with that given power, but where is the fun if the power is small?and upgrades on this car are basically more on the exterior looks. supercharger on crz?the polo tsi already have both turbo and supercharger technology...just spend bit of money to unleash the power!hehe