Lemongrass,

I have read all the posts here and I don't want to confuse matters although I have vast experience in this matter. SSI is basically a type of welfare for the disabled and your husband's income plays a vital role in the amount of SSI you will receive. If there are no children the reduction starts when he earns over $639 a month and the SSI is reduced by $1.00 for every $2.00 he earns over that amount, there is nothing payable if he earns over $1727.
If you are eligible for Social Security Disability (different from SSI), his income does not effect those benefits. To be eligible for SSD benefits you must have worked 5 out of the last 10 years prior to your disability date. Please visit your local SSA office before you get married to have a better understanding of how this will effect you. Just my 2 cents.