Congrats on your two new buns and yes we would love to see pics!
I second getting bowls that attach to the cage. As you get acclimated to your new buns, you can try different things to help keep the cage as clean as possible. But, generally speaking and just being honest, rabbits are VERY messy
but youll get used to it and probably grow to laugh at it. It's a very common thing to joke about that when you deep clean a rabbits cage, get everything organized and just so, it doesnt last very long because bunny will destroy things again in the blink of an eye
I have bowls that attach and water bottles. My hayrack attaches to the side and has metal wires to keep it contained as much as possible but hay is a never ending battle. I swear you'll end up finding it everywhere! Haha
I find proactive cleaning works better for me. I scoop out the pee part of their litterbox twice a day and I'm constantly hand picking up hay and keeping things as organized as possible. But it's kind of second nature to me, not bothersome at all. I'm a bit of a neat freak, though, so keeping up with cleaning rather then letting it get bad suits me better. Also, white bar soap as been a great deterrent for me. If you rub it on whatever they are chewing/mouthing it usually prevents them from going near it again. Except I wouldn't put it on their food bowls
I also wanted to add that just because they are brothers does not mean they will stay bonded. As their hormones kick in, fighting could start. You will want to get them neutered as soon as possible to be able to keep them in the same cage. But even after their neuter you could still have problems. Male/male bonds are definetly possible but same sex bonds statistically are more prone to problems. So be prepared to possibly needing to cage them separately if fighting should occur.
Cats do carry a bacteria that is dangerous to rabbits. So be careful with introduction and always supervise. There are several people, though, that have cats and rabbits who live in harmony. It just depends on the individual animals.
They sure sound like sweeties if they are coming over for scratches and pets. Welcome to the world of rabbits and to RO