Hey kmmurrdog, what a strange mixed set you have!
Anyway, if I were you I'd sell the requinto and the galaxy conga and buy Matador conga and tumba - but it all depends on what kind of music you play the most. The set you already have seems to be shifted towards high pitches and "aggressive" way of playing, suitable for funk, rock or anyway non-ethnic, nor traditional oriented stiles.
In my opinion the quinto-conga-tumba set is more versatile and can be played in almost any kind of music where conga sound is needed. Let's say, if you need more aggressive, crackling sound you just raise the pitch, and there you go...
But that's just my 2 cents...