You've done your research right.
Doing just the rear will help the understeer propensity on track. On the roads you wont really notice it too much I think. But a rear ARB is like £200.. which is nothing takes an extra 5min to install if your shocks are already off
Forged Engine and Dodson Gearbox @880bhp/745ftlb
Fully Stripped out w/ GT3 Rollcage &Tillet Carbon seats
Alcon SuperKit, with Project Mu H16-03 Pads
JRZ RS PRO- With full SPL bushings and Camber arms
Quaife front Diff