no to upgrade on brakes, spend a spring day cleaning what you have, get the wheels off (repair the rubber gaitors again probably) pressure wash the inner wheel arches, and clean the back of those wheels, clean the brake discs, and make the hidden bits of the car look good, you will feel better...
congrats on your purchase of such a low number trophy, have a look at the pure motorsports site this will give you some good ideas where to spend your money, enjoy
http://www.pure-motorsport.co.uk/clio_shop.php?cat=1&model=6
http://www.ebay.co.uk/itm/FORD-Racing-Puma-Eibach-front-shock-suspension-Decal-Sticker-/291069089718?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item43c511d7b6
i going to fit these puma ones, at least they say sachs
but as you know, the wheel assembly is simply hub with bearings, and brake, so it has to be one or the other, the bearing are the cheapest option, so start with that and good luck
the rubber gaitors are always coming loose and loosing grease, buy new bearings and replace them on both sides this weekend, repack the grease and get those gaitior clips tight.
I have had my clio 9 years, my kids are 6 & 8, I have always argued a three door is safer as the kids will climb in the passenger side door, away from the traffic, I have replaced the passenger seat runner once. the seats fold enough to get a baby seat in and out,
we had to buy a phil & teds...