Rice selection?

Okay, so I've finally decided to venture into proper japanese rice. (Yes, until now I've been eaten long grain, non sticky rice. Blasphemy!). I have bought it in the past, but that was about 3 years ago when I made sushi in Foods class, so needless to say I don't remember much. I did read the rice posts on here, so I had some idea of what to look for, but I'm not sure which of these are actually japanese rice and are going to give me that nice stickyness necessary in order to make things like onigiri. Choices: 1. Labeled as: "Kohuko Rose". Ingredients listed as: 100% california medium grain milled rice (water mill polished) Price: $10CA/2kg Appearance: small grains, no white stuff. Bag had some asian-looking symbol on it, but all writing was in english. 2. Labled as: Short or Medium Grain Rice Ingredients listed as: Short/Medium grain pearl white rice Price: $4CA/1kg Appearance: pretty much the same rice, couldn't even tell which was short and which was medium. Plain, english boring bag 3. Labeled as: Sun Rice Sushi Style Ingredients not listed Price: $6/750g Appearance: Lots of asian designs, sushi recipe on the back. Couldn't see the rice. So, are these all Japanese rice? Is the only difference quality? Are they all going to be pretty much the same to someone who's not an expert in rice (because if that's the case, I'm going with the cheapest! University is expensive.)
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