I do not feel you are bad to do this - admittidely I have done it too, but always with bettas (what's better, a cup that is impossible to cycle, or a 10g+ tank that is possible to cycle but isn't cycled yet?).
I suggest you use a *betta(see note)* for the first month, then 6 danios (there schooling fish) or another hardy fish. After the first month and a half, depending on how your water quality sits, you may add more demanding fishes/critters.
Note: another forum member has sad that bettas are a bad fish to cycle a tank with, becuase the amonia and nitrite makes them suceptible to fin rot/fungus. Well, I have never ever had this problem, and I highly doubt a single betta will put enough load on a 27g tank to spike amonia and nitrite to levels high enough to cause fin rot/fungus.