I'm confused, do you have separate vegging and flowering sites? If so, then your new wave should work for vegging. Vegging is the easy part. I have 8 T5's vegging 36 one gal pots and they reach 12" in 5 weeks. I've also vegged under a 1000mh conversion bulb. I saw no difference in veg rates. I'd stick with the flouros.

Start your flowering in the smaller pots, pull the males then place the females into the 3gal pots. They'll be ok. If you flower in a 4'x4' garden you'll be flowering with 62watts per SF which is great.