I picked up that you are living with Asperger's Syndrome - If you are higher spectrum, then a Bengal would most definitely NOT be for you. They are high intensity, and can be extremely noisy. Both things that will put added pressure on your day to day coping strategies.
I have a tendency towards OCD with certain things, and have had to find workarounds for loads of triggers to cope with my Bengal, as he is demanding, noisy, and will simply trash my house on occasion! He has no respect for me, as I am simply his servant...
If you are hesitant to go out, then you will ideally need an indoor cat - If a Bengal escapes, they normally get the taste for 'freedom' and you have then pretty much condemned yourself to a noisy monster who will want to be outside all the time... There are other forms of exotic that would be good for your allergy - Sphynx, Abyssinian, Peterbald - all of which will be content to be an indoor cat and all of the ones I have met are not bothered about outdoors if given love and stimulation in doors. My friend has two Peterbalds, they are adorable, and I would certainly consider that breed instead of a Bengal, if I was in your position.
Good luck, and keep hunting - The perfect furbaby is out there for you!