Well generally I agree with what showtime's mentioned.
I've been having an FM2 for quite a couple years and I intend on keeping it as a collector's item especially since it's got a nice serial number

I like it so much that it's replaced my auto-SLRs.
I'm not sure if you're totally new to photography but I've seen some newbies buying new FM2's (when they were still in production) and get discouraged 'cause it's hard to use and they did not get the results they wanted, eg. exposure all wrong, totally out of focus. They got so demoralised they decided to sell their mint FM2s to the shops and lost heaps of $$$. But there are also those who hold on to their FM2 'cause it's cool telling people they have one :bsmilie:
So FM3A might be a better choice for you. At least in the initial stages, you leave it on aperture-priority mode and concentrate on composition and focusing! Once you gained more experience and confidence move on to full-manual mode! Or you may opt for other SLRs as well as they can be fully manual, if you want them. There's always a temptation to leave it all to the cam and thus not learning much. What I feel is, work on the composition and then slowly when you get a better feel of the camera and gained confidence, proceed to the technical bits.
Just my humble opinion