OK guys, simple question....what tools should I get for milling and turning besides the usual selection of cutters and bits, DRO's, a 125mm swivel milling vice, quick change tool post, live centre, ER32 collet chuck set?

What are the tools that you just can't do without, DTI's, boring heads? All I'll be doing is mainly turning down items, putting in circlip grooves and the odd bit of milling but I (read my work) want a good selection of tools so that I don't have to wait for a tool to arrive before I can set up a machine or do some machining.