Why are you a bunch of MH haters? You could run a 70w viper and be great on that tank. Lot's of nano systems run MH's.
A 10g is most likely 20" long, I'm not even sure you could get a high output T5 for that size, but you might be able to.
For what your planning to keep an 18w PC bulb would work fine, but the halides do give the shimmer, which is pretty cool and something I miss since switching my tanks to T5's. I will be going back to the MH's soon.