I've only had a Brother sewing machine (purchased by my husband, not me) for a short while, it's an embroidery machine so I don't, and won't, use it often. It's a lower price model and well ... looks and feels like a lower price model.
Other items I've owned made by Brother are printers, faxes, phones, calculators, and possibly more stuff. Overall the Brother "brand" does not impress me ... cheap plastic 'stuff'.
I would love to have the Horizon. I'll have to make do with my Janome 6600 (which I adore!!!). You'll regret not having the extra harp space that the Horizon offers, and if you haven't tried the accufeed (and I don't know if the Brother has something similar), you'll love that as well!!