Ive been told alignment is definitely needed but I've also been advised to allow new springs and bushes to settle properly as if you fitted it, got it aligned immediately you might find 500-100 miles down the road it was comepletely out of alignment as everything settled.
Obviously you can repeatedly sort out alignment several times but I fitted coilovers, new arms, superpro bushes, ALK, and ball joints plus a dogbone, new brakes and discs and am waiting to fit ARB front and back. My car has settled noticeably over the last 500 odd miles and handles fine. Ive been keeping a very close eye on tire wear etc to make sure I'm not going to get a nasty surprise and plan to align once ARBs are fitted.
Dunno if this is the wrong way to go about it to save the cost of a cpl of alignments, just what I was advised by a friend.