This is what I use:
http://www.extech.com/instruments/product.asp?catid=26&prodid=81
I'm in the industrial battery and charger business, the ones that go in your electric forklifts.

The meter above has essential stuff you will need in trouble shooting your trucks. DC amperage and capacitance will be invaluable for you. AC amperage will be good if you work on the newer AC trucks. If you only buy a multimeter you will looking for these meters individually anyway. So just get them in one nice package now.
I looked for a meter like this for quite some time, and this Extech is loaded for the price. I actually shelved my Simpson 260(great meter, but fragile) for it. I think you can find the Extech for $150-$170ish (American) online.
I going the upgrade the the next model up soon. I put 480 VAC across the resistance setting and needless to say I can't measure resistance with it any more.

The IR temp on the higher model will be great for me as well.