Aye, the main thing is you like it!
Some of us spend tonnes of cash on our 172's, but does anyone really notice them... ?
At the end of the day, we're all just driving clio's... but we like em and thats what counts mate.
I would get some white/ anthracite mk1 turbine wheels, lower it a bit, clear side repeaters, and leave it at that for a while.
Am guessing you wont want to keep the car forever, and the more resources you spend on modding this one, is time and money taken away from getting a better next car.
I got to a point with my last clio, when i thought sod it, im planning on spending so much, for that money i could get a 172.
Guess it depends how old you are and insurance etc etc... ?