out of interest, how much would a decent set of coil-overs be likely to cost, seen a few on ebay for around 160-200 quid
Starting price for something half decent is probably around £600...nearer £1000 for a kit I'd be happy to run.
Springs/dampers will give bettern handling/ride...but not go as low, if dumped in the weeks, rock hard, abysmal handling is your thing.
Eibach springs with Bilstein/Koni damp[ers would be my choice.
And Eibach anti-roll bars on top.