First let the news of increased dividend and the news of this acquisition settle down a week or so.
The old "good buy" range was under $17 particularly in the $16.50-16.60 range ... only time will tell what the new range will be but let the pps settle down before attempting to define such.
BGS historically has $.50 to 1.50 dips that have nothing to do with the company ... suspect its small group of shorts playing games, but these dips have always been temporary and are where better entry points are gained.
For completeness for any newer investors ... almost assuredly there will soon be a secondary offering which could cause a push to the $17 area and near $17 would, IMO, be a could entry for a starter position ... and I would always recommend incremental purchases layering in a third position each purchase over a period of time.
Remember that we will probably have another budget stalemate in a few weeks as well as ongoing EU issues which could drive down US stock prices.
Depending on your objectives, I don't know if there is ever a bad time to get into BGS. I like their company very much, their dividends have been pretty good for years, and I don't know of too many better companies to go with.