I have no affiliation with them, but the same shop (Gigi's Fabric Shop) in Florida sells both Janome and Juki, either of which would be my recommendation if either brand has a machine that meets your needs. Most Janome models are going to be 9mm machines; Juki tops out at 7mm stitch width. I would consider reaching out to them, either via JukiJunkies.com or JanomeJunkies.com and ask which models of each brand have crosshatch and the small stitch width/length you mention.
For decent throat for FMQ, you're likely looking at either the Janome 6700 or 9850 (the Continentals are HUGE, and the M7 doesn't have the best reputation), or the Juki HZL-NX7, DX-3000 or DX-4000.
Thanks for the information about the user groups and the specific models. I will definitely check out all of them.