Discussion: Thirteen by Kelley Armstrong's covers

Okay, so this isn't going to be a real discussion, but I have a dilemma and I need your opinions. I was browsing the Chapters/Indigo website, figuring out my next orders. I've taken the habits of pre-ordering the hardcovers and trade paperbacks that I want, just because the prices are so much better online and also comparing it to Book Depository to get the best deals... and I came across Thirteen by Kelley Armstrong. Now, I've seen the US and UK covers, but I think the Canadian cover is really recent and this was my first time seeing it. Below are the covers: US, UK and Canadian respectively...

What do you think of the Canadian cover? Honestly, I don't really get it and it turns me off a little ^_^; Guess I won't be getting that copy ^_^;

Now's the real question though... Which one should I get then? The US or the UK one? My problem is that the last three books of the Women of the Otherworld series: Waking the Witch, Spellbound and Thirteen are a trilogy. I wished my covers would fit together... I actually had the same dilemma when Waking the Witch came out. The Canadian cover wasn't great, so I went with the US one - although that one changed. Then, when Spellbound was released, I went with the Canadian cover... Sigh, I wished I was psychic and knew what the subsequent covers would look like.

US:

UK:

CDN:

Also, is it me of none of the editions has a continuous thread for the three covers... I mean, the first two covers match, but the one for Thirteen seems to be coming out of nowhere!

So now, I have the following:

What do you think?