IMHO - A 5" screen is kinda small for any more than one image on it at a time. I'm referring, of course, to using the split screen function of 2d/DI - 2d/map - DI/map. You can get a 7" screen and still stay around your budget.

You might want to watch for sales at the big box stores, and contact Brian@BBGMarine (member ID) for some price comparisons. Brian is also known for his knowledge base and getting our members the electronics that best serve their needs/wants. You can find his posts on the Member Sponsor Classifieds Forum, and his contact info is in his signature line.