I just feel that my steering is feeling quite vague right now, like I can't really feel any grip response from the road, just wondering that once I've had the ARB's and diff fitted whether getting bushings done would make a difference?
....Fitting lightweight wheels will make a very noticeable difference but obviously depending on the alloy weight itself. I went from OEM Monza 18's @ ~11kg down to OZ Alleggerita 18's @ 8.03kg each. However, a cheaper alternative might be the TD alloys which weigh ~9kg IIRC.
But it's the combination of several mods which really make the difference - Modding is a very slippery slope!
EDIT: As Dom says, good alignment (not by your local KwikFit types) is a key factor and essential after a suspension mod.