Posted: 16/01/2014 at 20:47
Lots of good advise above.
I'd recommend the Wolf system of interchangeable handles and assorted heads for tools. I haven't got the system but would if I needed to start from fresh.
Don't think anyone's mentioned a thermometer for the GH ,not sure it's a tool more an essential item. Most people rate the max/min one's, if you choose this get one which you can change the battery.