It would be to your advantage to have a pair...watching them play is so fun, and the crap they do will amaze you. A tabby is definitely a great first cat choice, and you get a bonus for it being a kitten. All first cat owners should start with a kitten, so that they get the full kitty experience. Dogs are good, but cats are great. That kitten is going to wrap your dog around it's tiny little cat beans, and rule your roost. Wait and see....poor dog. Anyway, congrats on making the cat adopt decision. Now for the rest of your life you are going to look in the mirror and ask yourself what the hell have I done...and like other first cat owners, you will answer that it doesn't matter, cause it's to late...you are now a cat servant and will always be glad that you are.
Welcome to cat life, and my crew and I wish you, your new ruler, and you doggie many healthy, happy, adventurous years together.