Slightly ot, but on the subject of balljoints - smack a wedge in to spread the pinch, then stick a scaffold pole under it, tie it to the arm near the bj with a short length of big chain and lever downwards. Assist with lump hammer and conviction if required. 
A pair of tin snips is something i always regret not having, then forget to buy. And some good vernier calipers. Not so important if you're not fabricating much i guess though. What will you be doing with the tools over the next couple of years? May seem a daft question, but if you're going much beyond general maintenance and repairs there's some fairly random unexpected stuff that's invaluable.
Some suggestions anyway; basic essentials not listed so far:
Pump grips (can do oil filters with these nicely)
Pipe grips
Lever bars
Hacksaw
...and for the bench:
Lamp and adjustable stand
Selection of files
Impact driver
Picks
A pair of tin snips is something i always regret not having, then forget to buy. And some good vernier calipers. Not so important if you're not fabricating much i guess though. What will you be doing with the tools over the next couple of years? May seem a daft question, but if you're going much beyond general maintenance and repairs there's some fairly random unexpected stuff that's invaluable.
Some suggestions anyway; basic essentials not listed so far:
Pump grips (can do oil filters with these nicely)
Pipe grips
Lever bars
Hacksaw
...and for the bench:
Lamp and adjustable stand
Selection of files
Impact driver
Picks