I'm extolling you today to do the unthinkable:
Do your genre hopping now.
Once you get that agent, and you get that deal, it's a good chance you'll be expected to have similar books in your repertoire (hopefully finished and ready to be given up to a new home). The idea that you've written lots of different types of things is irrelevant when you've got that first contract.
It's all about getting those tremendously important people, the ones that mean more than anything else, anything: fans.
I mean sure. JK Rowling and fantasy go hand in hand. But if she whipped out a contemporary novel now, her fans would buy it simply because it was JK's.
If she would have tried to whip it out right after the launch of her first book? Maybe, maybe not.
From what I've been seeing on the internet and boards (searching this very thing) it is VERY important to have your genre down before you get that pub. Make sure you want to continue writing in that vein for awhile before you get stuck there!
Have you found your niche, yet? I'd love to know what it is!