Have a question about 3rd gen i7 compatibility

[xl2aNd0m]

I have a i7 3700 CPU but the motherboard is tiny, only fits 1 GPU and has no PCI slots for a 5.1 sound card. I'm wondering if someone can recommend me a bigger motherboard. I'm not too familiar with the compatibility of newer motherboards with older CPUs

 

[TechyInAZ]

Here is the best, or rather the only viable option. http://www.newegg.com/Product/Product.aspx?Item=N82E16813157293

 

[Calvin7]

ASRock Z75 Pro3
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157304

CPU Support List
http://www.asrock.com/mb/Intel/Z75%20Pro3/?cat=CPU