I have a Fluke clampmeter and it's feature set has nothing on my multimeters. I would not recommend a clamp meter unless you really know you need one.
There are some clamp meters that work in DC circuits but they are generally for AC circuits. You cannot simply clamp a clamp meter around the cord headed to your PC or whatever to measure current, it must be on one current carrying conductor at a time (or same phase). Clamping a power cord where the hot and neutral are running through the clamp causes the current reading to show as ZERO amps.
Besides the clamp meter knows nothing of watts and power factor. A banned Kill-A-Watt is much better for banned current readings.
As for a multimeter, are you just starting and don't know if you'll use the meter a lot or are you pretty sure you want to have a nice comfortable meter? In the Adafruit store there is a budget minded http://www.adafruit.com/products/71
offering which has a big display, though I have no experience with it I'd expect it to be one of the best values in what is really a throwaway price range.
For the money this Extech meter seems like the way to go: http://www.adafruit.com/products/308
Again, no personal experience but with the exception of true RMS AC ranges this meter has it all, including capacitance, frequency and even a temperature probe---so you can go around finding out your refrigerator isn't cold enough (that's what I did when I got a meter with a temp probe!) The Extech is auto ranging too!
The mas830L you mention shows a transistor tester which might be handy, but probably unnecessary.
Whichever you choose be sure to read the manual so you learn all the tricks of your new tool.