Although I understand BOMA to be a great place for breakfast, it does not have a Sunday Brunch. The only Sunday Brunch that I know of is at the House of Blues, at Disney's West Side. I think it's 35/A, but it sounds great. You can check out the HOB by going to www.hob.com .
The HOB "Gospel Brunch" is a really great experience. We did it last year for the first time. I think it was about $25-30, but I didn't pay so I'm not sure!!! It was a hot and cold buffet, with made to order omlettes (delicious). Plus a great gospel choir. Aparrently they vary, the one we was great, so hopefully you would be ok!