Well... the FX 8350 is quite a bit cheeper than the 3770K and will provide you with almost equal performance overall and you'll save quite a bit of money.
But if you can afford it, the best choice by far will be the Core i7 3820.It's about 2% slower than a 3770K but it uses the LGA 2011 platform which ensures you'll have an amazing upgrade path to Ivy Bridge-E 6 and 8 core processors.
I'll just list you three combinations of CPU's and moterboards which i recommend.
AMD FX 8320 system
http://www.amazon.com/dp/B009O7YU56/?tag=pcpapi-20
http://www.newegg.com/Product/Product.aspx?Item=N82E16820104361&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
http://www.newegg.com/Product/Product.aspx?Item=N82E16813130620&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
Note that the FX 8320 is slower than the FX 8350 at stock, but since they're basicly the same CPU, you can clock the FX 8320 to 4GHZ and you'll get the same performance.
Intel Core i7 3820 system
http://www.amazon.com/dp/B006YM9JSW/?tag=pcpapi-20
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157289&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
http://www.newegg.com/Product/Product.aspx?Item=N82E16820233198&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&AID=10446076&PID=3938566&SID=
I know this system is a lot more expensive but if you really want a good upgrade path and you can afford it why not