Neil, as you said - he now does the black art coilovers - which is what ive got on mine.
they are made and designed by the guy that used to make the Leda coilovers to mikes spec, exactly the same but with high speed valving - so in some ways they are a slightly improved version of the Leda's - and cost about £1200.
definatly get a 6 degree beam, as your probably aware theres several options, Danny does different levels of beam ranging from £850 ish up to £1400 ish
or theres the Ahmed rear beam which is £1000.
all will be a great improvement over the standard setup, but will depend on your budget and how far you want to go with it all.
adjustable front TCA's would help the situation aswell.
HTH