I would search the web and ebay and find out people's experience with refurbs of that model. some manufacturers job out the refurb work and the results can be very spotty. sometimes it's a totally new unit that was open box. sometimes they've been repaired, sometimes someone at the refurb center plugged it in, saw that it lit up and said "good enough for me". I would also read through the warrantee terms carefully. You'll probably have to exchange it for another refurb if you have problems. I've bought plenty of refurb stuff and that has been my experience. You just have to decide how much of a hassle you are willing to put up w for the discount in price.
manufactured refurbished
What are your thoughts on Manufactured Refurbished products? In question is a Harman Kardon hk990 int. on Ebay for $990. This is straight from the manufacturer with full warranty. I've been looking at this product for awhile and am highly interested at this price point but a little nervous about spending money on a product that may have recurring problems.