I think it's me you're really replying to, since those were my points.
Yeah, we got Biereth. He was a young guy who hadn't scored many goals at our level, but it worked out great for us. As soon as he proved himself, Arsenal recalled him and sent him off to a higher level. Repeating that success is the trick, and not all of the young players doing the rounds on loan will end up making it.
Halliday is far closer to the end of his career than the start and we'll see how it's looking once he's played a few games. If he was a few years younger we wouldn't have got a sniff. Hearts offloaded him to us, then go after Scott Fraser, a player a lot of us fancied when his name came up. That's where we're at.