Chen, I got the bulbs recently. Its not all that its cracked up to be. I mean its better than stock, but its nothing like HID or anything even close. The guys on ebay never have them in stock and you gotta wait like a month before you'll get it. I bought it from some guy who clearly stated that it was going to be shipped same day or at latest, the next day. Never got mine till a month later.
Bravo is correct regarding how the stock lights having bluish tints, it's not very much but it is noticeably bluish. ANd stock is more than enough having to deal with the problems or consequences getting the higher temp bulbs.
Beware getting these bulbs or any higher temperature bulbs. I got the same Euro Dezign ones on eBay for $10 except they were 5600k. The problems I got with these were, after about 4k miles on my bike using the high beams, the glass lens in the high beam housing did crack. And also if you use the high beam alot/regulary, you have to worry about your battery draining out and having to recharge it every so often since they run higher wattage! I don't the cheaper price you pay is worth the hassle dealing with these bulbs. They maybe be better/a little brighter than the stock but the hassle is way too much. I already went back with my stock bulbs. I still have the Euro Dezigns, I would give it to you guys for free but since it causes more problems I wouldn;t even do so.