i use this one on the big jobs
EK 15/50 G
u just have to be careful it doesn't crush your fingers though
but will give u a perfect crimp every time
search for knipex on ebay
spend 200 to 300 bucks and get good crimper and side cutters and will last for many years
otherwise like the others said get one from jaycar as it will do for what u want
buy the correct dies for it too
u need one set of dies to do the red blue yellow insulated terminals
and another set of dies to do the brass or silver uninsulated terminals like used on the white coloured plastic connectors
afew weeks ago I looked on ebay for crimping tools
u can find ones with a crimping tool and 5 or 6 dies all for around 100 bucks and that's in Australia
they should be fine to wire up a whole car