Im a Janome groupie myself. I had to borrow a friends brother one time and I just couldnt warm to it. Janome are having sales at the moment and $800 for sewing machine and overlocker is pretty good.
I'm not sure where you live but see who does the servicing locally. My town have local Janome servicers but Brother machines have to get freighted to Townsville or Brisbane for repairs/services.
Once you get used to threading the machine you wont even use the auto treading thingy. Plus, modest priced overlockers dont come with threaders and you'll be doing that by yourself anyway