Welcome aboard! I personally wouldn't sell the car, since buying a new car would be a major doodad, since not too many cars can match the ole' 3 banger engine in the Swift. If you think that the ride in it is uncomfortable, so what? If it gets you from point A to point B, then it's doing its job, and as long as you're not sitting in traffic all day, then you don't really need your car to be comfortable IMHO.
As for the mods, definitely get lower powered DRLs. Personally I drive with my lights off except at night or when they are needed. In my experience, driving with headlights on during daytime doesn't do too much good unless it's cloudy, but otherwise, they are just a distraction to other drivers. But that's just my opinion.
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