IBM dont give a toss about band 8's, and only a bit more about 9's. It all depends on what options you have on the table. Personally, given the current state of the employment market, id go with 8, and try and proove yourself for 9 once in there. They may not give you the promo, but you can always leave. Probation is standard. Nothing you can do...if they want they can ( and have) shows 8's ( and 9's as well) the door before and after probation.