I love backpacks that can pack a lot and aren't bulky... I've been using a pretty regular 20$ Billabong for years and it has suited me quite well for general purpose. Well built, carries quite a bit of stuff (I can take clothes for a weekend out, maybe a bit more and my techy stuff - laptop, chargers, camera). Previously I had a 30$ one from Puma, but it was more bulky and eventually "disintegrated" itself...
Although these look great, I don't think spending 54$ on a backpack is worth it, much less 250$... But I might be completely wrong, so I'm awaiting on your review