Hi Jamie,
Welcome to the forum
Let me five you some basic info just in case there are things you didn't know...
First thing's first, a rabbit needs to be neutered or spayed. Unspayed females have an 80% chance of getting uterine cancer, and unneutered males (in general) will spray. Having the bun altered will also help with behavioral problems and allows you to bond then with another bunny in the future if you would like. Not all vets will treat rabbits so it is important to locate one in your area. If you add your location to your profile, we can help you with that.
Second thing is food. Hay is the primary source of nutrition, not pellets. Pellets should be plain, not full of colorful bits, nuts and seeds, etc. We can link you to more details if you'd like. They always need fresh water of course. Rabbits can be given veggies (lettuce and herbs mostly) daily as it is part of a healthy nutrition. Sugary things like fruit, carrots, etc. and gassy greens can be given in small quantities on occasion up to a few times a week. * It is very important however, that when introducing fresh veggies and fruit to your bun, that you do so one veggie/fruit at a time and see how the bunny reacts to it.Some rabbits will react to certain things, some won't react at all, but best to be cautious, especially if it is a baby. If it is a baby, some say it is best to wait until 4 months of age. If you check the library, you will find a ton more info and even the "safe food" list.
As for housing, anywhere you put the bun should be safe from drastic temperature changes. For example, not in the direct path of the air conditioner, heater, and things like that. Be careful with windows as they can make a bunny overheat during the summer, or get sick with breezes etc. (Speaking in general)
You can let a bunny roam free in a room, or even the house, if it is safe. This means, all things such as wires, magazines, etc. should be out of range. I would personally prefer they at least be restricted to a room as it is much easier to make it safe. Rabbits can be litter-trained so that is really handy. They do sell protective tubes to put over wires to bunny-proof areas. Another thing you can build is a pen. We especially love NIC pens here. As for cages, most cages found in pet shops are waaay too small for bunnies. Again, NIC condos are great. If you don't know what NIC grids are, just give a shout and we will show you.
Other than that, rabbits love to play so you will need to have time to play with your bunny. They are great fun in all honesty the general populationhas no clue what rabbits are really like. They are great for the right people so if you think it sounds good so far, then you're on the right path towards being owned by a bunny. Oh yes, don't think that it will be the other way around. You've been warned
As for the cats, it really will depend on your animals and their personality. My cat adores them and has even started "talking" to them. However, I do not leave them unattended as even a playful bite can be deadly for a bunny. Very important to check allclaws prior to letting them play if they aren't declawed.
If you decide to get a rabbit, consider adopting from a local shelter, even if you want a baby. They are often overloaded as people often let them reproduce or dump them because they didn't inform themselves prior to getting one. When choosing a rabbit, make sure it is 8 weeks or more, alert, no crusty eyes, leaky nose, and check the teeth as well.
Ok I think I talked enough :?LOL. I hope that gives you a brief idea. Byie