Is it worth really buying a Fluke for hobbyist use?
I think you should make sure you select a multimeter that answers the questions you need answered.  Or start with a cheap one, and if you need more features / better accuracy, get a better one.

Most folks working on digital electronics need to know if:


Is this signal high or low?
Is this signal switching?
Is this wire continuous?
Is my transistor PNP or NPN, and is the Radioshack package correct? (it wasn't, once, for me)
How much current is running through this section of the circuit?
What is the duty cycle of the PWM signal?  (This is easily found by doing a little bit of math based on the voltage)


Really, to solve all those problems, a $5USD digital multimeter does all that and more.

If you need to measure capacitors, inductors, are panicky about your duty cycle, or need tight accuracy, or you need the thing to survive falling down a waterfall or being inside crazy EMF fields or your'e gonna beat the thing up, I'd look for a Fluke or something.

If you need to watch really fast signals, you should be doing that with a logic analyzer or an oscilloscope anyway.