ive been thinking about getting one for a while, is it worth it? ive just looked at these [URL]http://shop.genusdigital.com/products_detail.php?cid=5&pid=13[/URL] has anyone ever heard/ used one? it seems like a very cheap way to try it out but im a bit put off by its size and simplicity. if they can be this small then why do the "hifi" versions need to be so big. what do you think?