[DSLR] Which lens UV/Polarizer filter should I get?

I’m not here asking for opinions or to have people tell me what I should do different. I just want to know, from people that have some sort of experience with SLRs and/or these brands, which would be the best option for a simple UV filter to keep on my new Canon T2i (550D) kit?
– http://www.amazon.com/Zeikos-ZE-UV58-58mm-Multi-Coated-Filter/dp/B001LMSDNW/ref=sr_1_1?ie=UTF8&m=ATVPDKIKX0DER&s=photo&qid=1271818652&sr=1-1
– http://www.amazon.com/HOYA-58mm-Haze-Protection-Filter/dp/B000GK0144/ref=sr_1_1?ie=UTF8&s=photo&qid=1271612417&sr=1-1
– http://www.amazon.com/SUNPAK-CF-7034-UV-Ultra-Violet-Filter/dp/B00009W3U4/ref=pd_bxgy_p_text_b

I have the same doubt with the polarizer lens: I’m in doubt between a Tiffen, a Hoya and a Sunpak. Which to choose?
– http://www.amazon.com/Tiffen-Linear-Polarizer-Glass-Filter/dp/B00004ZCDL/ref=sr_1_6?ie=UTF8&s=photo&qid=1271824883&sr=1-6
– http://www.amazon.com/Hoya-58mm-Circular-Polarizer-Filter/dp/B000LFUFQS/ref=sr_1_7?ie=UTF8&s=photo&qid=1271822127&sr=1-7
– http://www.amazon.com/Sunpak-CF-7059-Circular-Polarized-Filter/dp/B00009W3U9/ref=sr_1_1?ie=UTF8&m=ATVPDKIKX0DER&s=photo&qid=1271822270&sr=1-1

[OBS: Although the UV/Polarizer are from the same brand, some are from different lines of product etc. So check the links if you can.

I guess, if someone wants to suggest a better option, from Amazon or Newegg (including Amazons retailer partners), under $20, that would be ok to…

Thanks a LOT for any help :D