As many of the others have said, you won't go far wrong with Fluke. A high-impedance input doesn't load the circuit, but the only thing to watch is that in some cases the high-Z input can result in some head-scratching due to capacitive coupling, e.g. reading a considerable voltage on a wire which isn't actually connected to anything!
Although digital seems to reign supreme for many people these days, I still like a good analog meter for much basic electrical work. I have a trusty Simpson 260 which I would heartily recommend.
