From what I know all onboard audio is essentially the same and probably shouldn't be a huge deciding factor even if there is differences. I heard realtek does not have good onboard sound. Asus Z77 boards have wireless capability with mobile hotspot technology but I don't think any bluetooth. I actually do not know of any boards with blue tooth, but I do know they make ad on cards. I like ASUS the brand personally. Other good brands seem to be Gigabyte and ASRock. Intel boards are good too, but if you are not overclocking then you probably don't need one.
I went with this: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131819
got it on sale for $215, kind of pricey but I bought anyways.