Sekonic L-558 Dualmaster
it has incident, reflected, and 1 degree spot metering. Fantastic meter, I've got one.
Yes, a light meter can go a long way towards helping your exposure, however you still need to know the fundamentals of exposure - what you're exposing for, why you're exposing for it, what your film can handle, what your paper can handle (the 'dynamic range' (slightly inaccurate term, but perhaps easier to digest in the context if a digital forum) or paper is less than film - and the DR of matter paper is less than that of glossy), and how to overcome problem (eg, if you're taking photos in the snow, reflecting off the snow isn't going to help you unless you know to open the shutter.
a light meter doesn't automatically get the best exposure - it still tries to make everything 18% grey in the exact same fashion as your camera. But an external light meter makes it easier to say exactly what you want read (well, with a spot meter anyway!), as well as making it easy to do things such as reading the highlights and shadows to see if the brightness range of a scene is too great, and then finding the average of those readings...things like that.
However, you also MUST learn how to master your camera's exposure - learn how it exposes in different modes because you won't always have your light meter with you, or even if you do, you may not have time to work it.
I would strongly suggest getting a book or two on exposure, or even looking on the net for tutorials (some of the online tutorials might sink in more, books solely on exposure can get ridiculously in depth). Learn more about exposure, then when you feel limited by the capabilities of your camera, or you can truly understand how a light meter is useful (you're starting to recognise that there are things a camera meter simply can't do, or is cumbersome to do with), THEN get a light meter.
Also consider that a good light meter can last for quite some time. It's a long-term investment - if you want it to be. If you get a good one (like the L-558) it'll probably outlast your camera body, easily. It'll probably outlast this one, and the next one, at least.