audacity is pretty good for editing. some people like garageband but I've never tried. when you come back, give fcp or fce a go, you'll like it.
audio recorders, well you get what you pay for with these. edirols, zooms and tascam are the popular ones with the odd olympus in there. get one that has uses sd cards instead of built in memory.
figure on spending in the $300-450 Cdn range for a good recorder.