Amazon has this machine with some GREAT reviews. I also found it at Costco where it is about $50 cheaper- only $200 so well within your budget. You'd have $300 left over to buy all those weird spools of thread
http://www.costco.com/Browse/Product.aspx?Prodid=10043602&whse=BC&Ne=4000000&eCat=BC|89|28514|28516&N=4010114&Mo=0&No=0&Nr=P_CatalogName:BC&cat=28516&Ns=P_Price|1||P_SignDesc1&lang=en-US&Sp=C&hierPath=89*28514*28516*&topnav=
It's the Brother 1034D in case the links don't work. I have an older serger that is okay, but am thinking about replacing for this guy. All these overtime hours I am putting in ought to be good for something!!
Trina