hiya!
I have a Bernina "bernette" that my mum got me. She's a dressmaker from way back (and my grandparents both sewed, grandad was an upholsterer!) and she reckons Bernina are great. She's been using the same one for at least 25 years now, making clothes for her own shop and everything. Still going perfectly. She shopped around for mine, and even checked out eBay for an old one like hers, but they were still really exxy. Ended up finding the new one on sale at a small local sewing shop, but it was advertised thru the Bernina website. Looking at around $250, I'd say.
HTH! I'm not an expert, but I like my machine.