One option for you, there are plenty more, but I just want a car I can be comfortable in and enjoy on the road, not just a track or freshly surfaced motorway.
Michellin Pilot sport 3 tyres, I'm on 18" wheels.
Koni FSD dampers about £500
Eibach pro kit springs about £140
Wishbones, anti roll bar droplinks and bushes in good condition
Momo upper strut brace (no idea if this helps make the difference, never been without it.)
I have no janglyness, the car is so compact and solid, it's not in the slightest bit hard and jarring, just lovely and refined on crappy roads and it corners with very little body roll.
You'll need a grand really, but I think it's well worth saving more and get all your suspension componenets/bushes done at the same time.
GT 3.2 V6 - Q2, KONI FSD & EIBACH PROKIT, GTA REMAP, MICHELLIN PS3's, BMC CDA
159 SW 2.4JTDM TI - ALFATUNED, WIZARD BACK BOXES, KW V3 COILOVERS, NOKIAN WR A3/MICHELLIN PS3, PCA DYNAMICS ALIGNMENT.