Just look for any that support DTS-X and Dolby Atmos. You'll be future proofed for awhile. Even though the additional 3D aural channels they provide IMO are useless. It is the future codec and is very clever. I support it's object based, simplified channel handling, non aural capabilities. This year there are many receivers even in the $350 price range (after sale prices) are firmware upgradable. Just google search atmos, dts-x, avsforum for a 2015 list.
I wouldn't buy off of Accessories4less if I was you. For the most part the whole "deal" there is getting last year's models (often refurbished) for cheap.
The problem is, you can't use last year's models if you care about using that 4K TV properly. That TV has HDCP 2.2 support, which is needed for future 4K Blu Ray support. Last year's receivers don't have HDCP 2.2. You are blowing your foot off for future use if you buy off of accessories4less, as most of them won't work with future 4K Blu Rays. You need a new model.
Here are your options in your price range:
http://www.amazon.com/Denon-AVR-S510BT-Channel-Receiver-Bluetooth/dp/B00YAO43YG
http://www.amazon.com/Onkyo-TX-SR343-5-1-Channel-V-Receiver/dp/B00WSED53A/ref=sr_1_2
http://www.amazon.com/gp/product/B00V5VJ3TM/ref=pd_lpo_sbs_dp_ss_2
Of those I vote the Yamaha, as I have had problems with a new Denon model and that Onkyo doesn't include an auto calibration feature (which is a HUGE deal). But any of them will work.
I wouldn't buy off of Accessories4less if I was you. For the most part the whole "deal" there is getting last year's models (often refurbished) for cheap.
The problem is, you can't use last year's models if you care about using that 4K TV properly. That TV has HDCP 2.2 support, which is needed for future 4K Blu Ray support. Last year's receivers don't have HDCP 2.2. You are blowing your foot off for future use if you buy off of accessories4less, as most of them won't work with future 4K Blu Rays. You need a new model.
Here are your options in your price range:
http://www.amazon.com/Denon-AVR-S510BT-Channel-Receiver-Bluetooth/dp/B00YAO43YG
http://www.amazon.com/Onkyo-TX-SR343-5-1-Channel-V-Receiver/dp/B00WSED53A/ref=sr_1_2
http://www.amazon.com/gp/product/B00V5VJ3TM/ref=pd_lpo_sbs_dp_ss_2
Of those I vote the Yamaha, as I have had problems with a new Denon model and that Onkyo doesn't include an auto calibration feature (which is a HUGE deal). But any of them will work.