Well I have only used a gammil and an Innova. I have an innova ( well it is coming on friday...but I work at my LQS and have been using an INnova for a year now) and I think you should read up on them...YOu can use any thread with them ..it embroiders.....they have a patent on an oil-less head....the tensioner and it is an industrial machine....and it is within your budget. The Website is www.ABMinternational.com
it shoudl tell you what you would liek to know and if you have any questions you can always PM me.