You need to understand that movements have different features or "complications" with the 7750 being one with many options. A movement is a bunch of gears, many of which can be moved to fit a different look, most common is where the running seconds will be locates, i.e. seconds at the 6, 9, 12 with the 6 or 9 being the most common and with seconds at the 12, you need a quality production in order to get reliability. With a 2824 or 2836 you have far less gears / complications, thus, less can go wrong. Take for example, do you (as a noob) know how to change the date wheel without messing up your gears in your 7750? Try changing it at say 02:00 and you may find a lot of resistance in the gears which can break gear teeth and bind your watch up. After more rep experience you would have realized that you should change your time to say... 06:00 and you would not encounter the binding issue. That is just one example (btw, I have a genuine breitling evo and I encounter resistance when changing the date on occasions so it is not limited to replica watches).
So why discourage a noob from buying a 7750, outside of causing you frustration and souring you to this hobby, noobs can cause a lot of problems for dealers by messing up their watch and then telling the dealer that it was a bad watch that was shipped. Noobs file paypal disputes and create payment problems for the rest of us. Do you see where I am going. Buy what you want,, but I am trying to answer the question of why some of our members will try to persuade a noob from buying a 7750 as their first replica.
You will most likekly not find a mall jewlery store that can service a 7750, we have trusted watchsmiths here that may service them, but your cost is going to be $150 to $225 at least, if you can find someone to service it. (my facts may be out dated a little, but the concept holds true).