Micro SD card advice?

[tvout]

Hi all,
I'm looking into getting a 16GB micro SD card for use in either my Nokia N95 or HTC Wildfire but wasn't sure about several things:
1) How can you be sure that one of the many on ebay or amazon for around £20 are genuine? Is it just a case of buying from a well known big seller in the UK?
2) How important really is the class of speed in a mobile phone? I've seen lots of class 2, some class 4, not sure about class 6 or above though. Is it worth the couple of quid extra to get a class 4 instead of 2?
3) Has anyone got any views on the different brands, e.g. Sandisk, Integral, Samsung, Kingston?
I was curious about the cheaper ones on ebay from Duracell wondering how good they might be? Good renowned brand for batteries maybe but unsure if that amazing for memory cards?

Any thoughts or advice much appreciated :o)

[Delta Whiskey]

I would buy from a well known retailer, it's worth it for the peace of mind. I've seen one case of a 8Gb card being only 2Gb in reality. I don't think the speed of the card is relevant for a mobile phone, it would only be an advantage in something like a DSLR when shooting in bursts. I've used mainly Sandisk and Kingston, both of which have worked faultlessly. I don't know about the Duracell brand, but I would hazard a guess that they're made by a third party not Duracell themselves.

[Kymmy]

On the CLASS question, unless you're playing/recording HD then you don't need class 4 or above which is purely an indication of the transfer speed it can attain)

[Aragorn]

I usually use 7DayShop for flash memory, eg Toshiba branded 16GB MicroSDHC for £18 delivered.
As above, you won't need the fast cards for a phone.

[Paul K]

Same as Aragorn, I use a Class 4 for my camera as the camera can make use of the speed and is designed to use it. Apart from that 7dayshop has not let me down yet.

[Pauls9]

Higher speed helps when transferring to and from a PC. It can take a while to copy 16 GB of music tracks or photos.