I've just purchased an HTC EVO V (Virgin Mobile) phone and want to get a 32GB Micro SDHC card for it, but am not sure which one to get. I am looking at the SanDisk Ultra 32 GB SDHC Class 10 30MB/s for $35, but am also seeing 32GB non-Ultra SanDisk cards for much less. The non-Ultra Sandisk seem to be class 4 cards. Will I truly notice a difference between class 4 and class 10? Are there any drawbacks to class 10? I'm pretty much a newbie when it comes to this, so I would really appreciate any and all help you can offer. Thanks so much!!