UPS for 27inch mid-2011 imac

Hi, I know this questions had been asked several times already. But after searching the net, and reading all things I can about UPS for imac I've become uncertain on what UPS to get.😕

I have a BTO imac with 3.4ghz i7, and the 2gb Radeon HD 6970M

1. I want to know the full capacity power wattage, as I can't seem to grasp the concept of

200 watt from this link iMac: Power consumption and thermal output (BTU) information - Apple Support (I need assurance, I find it hard to believe this somewhat high performing desktop only consume 200watt running it full potential) I need to count what UPS capacity I have to get.😝

2. Is the sinewave important or not? I've been reading lots of forum post, articles, and arguments both local and in english that contradict eachother.

3. Which come to my third question, I have narrow down my choices on these similarly priced UPS http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SMC1000 I&total_watts=600&tab=models(sinewave) and http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BR1200G I

(not sinewave but higher surge protection rating)

4. Which then followed by my last question, because of the last blackout killed one of my ram module, I think I really need a surge protection and a UPS, and I understand both models I chose have several rating on surge protection, what do you guys think on the difference? or would I be better with a dedicated surge protection?

I really want to just get the one listed on apple store because I believe it will be hassle free for me and I won't need to ask hella lots of questions here, but I can't find anybody selling it in my country.

If you have other UPS suggestion feel free to post, I'll try to look up if it sold in my country.

Thank you in advance 🙂