Just a question, I didnt really bother to read the rest of the thread but whatever. Why do you absolutely want to waste your money on your first car?
You are most likely to destroy your first car more than any other car you will own later on. Why bother and add stupid goodies to it. It's not like you own a 1000hp Supra or a 1M$ Veiron.
If I were you I would pile my cash for something more useful. But hey it's my opinion, and I'm an **** so no one care about what I say.
What's the point? You are driving a cheap mass produced Malaysian car, why on earth do you want to debadge and modify it simply to increase your street cred? If you want to turn it into a cheap and cheerful road rally/trackday car then go for it but you should be starting with putting some decent (not necessarily high performance) tyres on it getting the brakes up to a high standard and putting full harnesses in, after which I'd precede to strip the car somewhat (but do not remove the headlining/all the trim unless you really want a proper competition car). If you've done all that then maybe consider strut braces a bigger anti roll bar and maybe some better quality dampers (do not start your suspension modifications by lowering the thing). If you're not going to be driving the car at the limit (which by the sounds of it given your economy concerns you're not) then do not bother trying to make performance modifications.
If it doesn't feel great to drive, does scary stuff under braking or it suffers from vibrations and you've checked the wheel bearings then a new set of tyres will make a huge difference, they're very expensive, don't expect to get much change from £200 on a car like yours with basic quality tyres (say a set of Eco Continentals), however no amount of modification is going to help if your beautifully refined chassis can't connect with the ground.
I've done the following to mine and had a good reason for each, none were senselessly bolting stuff on to it because I could.
Fire extinguisher (self-explanatory)
Rev counter - felt I needed one with trashing the thing everywhere, bit of a luxury.
Fitted a few interior lights to it - got a packet of stick on battery powered LED lights from Woolies, they're really convenient both for map reading and lighting up the boot if you've got a car with rubbish interior lights (took me a couple of days to realise there were any in it).
Set of Continentals - used to have four different brands I'd never heard of and its behaviour under braking was terrifying, with the new tyres I both feel much more confident it isn't going to swap ends when least convenient and it rides a lot more stably.
Four point harnesses - for road rallying, really didn't like the existing seatbelts (being tall the upper belt mounting was forward of where I sit and the tensioner was a brutal old fashioned type). As well as improving safety they also offer a lot more support, and are a cheap alternative to bucket seats (which I couldn't insure).
All the things I've done to it don't cost a lot, don't affect the insurance premium and whilst they don't make it any faster or add much of the bling you seem to be after all more than pay for themselves in terms of improvement overall.
They're regularly fitted as standard equipment to road cars, if the inferior bolt together ones are illegal then surely you can just get your welding torch out and make it a single piece
depends on the suspension and mounting of ur suspension, for some cars the suspension is mounted to the rails and the strut braces do nothing but provide a bit more chassis rigidity, which is better than nothing, but not really what a strut brace is designed for. for other cars the suspension is mounted to something less structurally integral, this leads to flex when u put stress on the suspension, this is where the strut brace really makes a difference.
i personally only run a strut brace up the front of my car as the suspension in the front end of R32 Skyline's is just mounted to the skirts, so there is a bit of flex, i noticed a definate reduction in mid-corner understeer.
saying that, i would only go strut braces after ARB's (anti-roll bars or sway bars), ARB's are the best bang for buck mod u can do to ur car imho, make sure u get adjustable ones, this will alow u to balance ur car's handling which is just as if not more important that the roll reduction they provide.