I echo Mrs B's advice. Talk to a Cruise agent. The number on this page is a very good starting point & you may find you may be offered a choice of cabins within your budget...........Wilba.
It depends on where you are looking and at what grade - if you selecting a Q X Y or Z these are usually gaurantee grades. Are you looking on this site or on RCI Web site direct. On RC own web site you can select cabin. But I would strongly suggest that after looking you then book with a cruise specialist rather than on line - why not phone the number at the top of this page. If you do go for a gaurantee it can work either way - you could get best available within a category ie best outside/ best balcony etc but yes you could end up with obstructed view etc.