Yeah I could do that. I was planning to run 150x2 on the amp, but doing it this way would give me better control over the loudness of the tweeters, because the main reason I'm getting the bigger amp is to get more mid-bass out of my woofers.
This brings to to another question. I'll be using a DMM to set my gains, but how would I find out what RMS my tweeters and woofers can handle independently?