If you put your general location in your profile, that will help folks to give climate pertinent advice.  There is no "one best" breed of chicken.  It all depends on your climate, your flock goals, whether you keep them penned 24/7 or allow them to have a lot of free range time.  Even decisions re: keeping them as forever pets vs. livestock which will be replaced when their productivity wanes.  How large will your coop and run be?  Mimimum coop/run size for back yard flocks are 4 s.f. in coop, 10 s.f. in run per bird.  This will also be a big part of the decision process.  IMO, you should answer this question before you even start to think about getting chickens!
Answer a few of these questions, and look at Henderson's chicken breeds chart to get started on narrowing down your selections. 
something else to consider:  Biosecurity.  Your mom is talking about maybe taking your birds to "shows".  IMO, this is the perfect way to bring any number of lethal and forever diseases into your flock.  Once your property is contaminated, many of these diseases are very difficult to eradicate.  For this very reason, many of us keep closed flocks.  We never bring any new genetic material into our flocks unless it's hatching eggs or day old chicks from a reputable breeder or hatchery.  I would never, in a million years, consider taking one of my birds to a show, and then bringing her back home again, for fear that I'd bring back one of the gifts that keeps on giving:  a "forever disease" to affect my flock for future generations.