I agree, my senegal is now 10.5 inches and eats better than I do! He is under a year old, I believe I got him last january. Very relaxed demeanor but this tank is a 90 gallon, the del I have is smaller and less relaxed, very shy still, and doesn't have the apatite either.
Generally dels grow bigger than sens, unless they are a shortbody morph, like my albino sen.
I say go for a del and an albino (then ditch the danios and get Eodons! lol) and keep your eyes open for a 75 or 90 gallon to upgrade into , a year is a long time to search and save.