There's nothing wrong with your Brother. Yes, the fancy, computerized machines are nice, but most of my students don't bother to bring those to classes. They mostly opt to bring their lightweight and/or back-up machines. Honestly, I've been thinking about taking my older machines to classes just because my computerized ones are SO heavy.
You need not be embarrassed about your Brother. I've seen a lot of really nice things made on less expensive machines. If you can make it work, great!
I've also heard that you only actually use 20% of your machine's functions, so why spend more money on more features you won't use?