As a suggestion, when asking for advice concerning keepers or any other team, league or player input, please provide scoring format, league size, starting lineup requirements, keeper rules(how many can be kept in total and by position and are 1st round studs from last year keeper eligible?) etc...This helps us in giving more informed and better input for your question. Also, as it pertains to your specific league, knowing potential keepers on other teams and your thoughts on who might be available to you when/where you pick in the first couple of rounds would be helpful.
That being said, unless you start 2QB's or think you can trade BB for early round draft picks I would not keep him if you like Romo better. Just keep 1 QB and get a decent back up later. Tolbert represents the better value strictly from an ADP stand point IMHO. Personally, I would keep Bowe without hesitation if this is a PPR league and/or you can start 3WR or more. I like to looks of things going in with Wallace, Bowe and Romo/BB. Tolbert is a weak #2 and better #3 or flex back. That backfield will share with Matthews getting every opportunity to try and win the job IMHO.
Just my 2 cents, good luck.