Piece of piss to get up to 200bhp. I think it's about 180bhp you have the same power to weight ratio as a stock Cos (not that there are many of those )

Assuming the car is standard I would go with:

Chip
-31 Actuator
Decent intercooler
Decent exhaust
K&N panel in standard drilled air box
Cam kit & vernier pulley

This little lot shouldn't break the bank and you can do it in stages.
Don't forget to sort the suspension and brakes as well though