Should i buy a Brabus Smart Roadster

Ok, so im 20, ive owned My fabia Sdi for over a year now (longest ive ever had a car for, 5th car ive owned since i was 17) i keep on throwing lots of money at it to improve (in my opinion anyway!) the interior and exterior look of the car. I own the car outright, however i cant help but think im just throwing money away.

Now instead of doing this, im thinking about a Brabus Smart Roadster, which will obviously cost more than my fabia so i may need to speak nicely to my bank manager, however looking pretty awesome as standard, i wouldn't want to change it.

At the moment id say im spending the same amount per month on modifying my fabia as it would be in loan repayments for a the roadster.

So what do you think i should do, ive got a MK2 golf as well which i use for pottering about in so im not going to be loosing any practical side by getting the roadster.