Well, you could have bought a used Mayflower O2/ODAC Combo:
http://www.amazon.com/gp/offer-listing/B00TQ2JDAG/ref=sr_1_2_olp?ie=UTF8&qid=1465173818&sr=8-2&keywords=o2+odac&condition=used
Matrix M-Stage Amp:
http://www.amazon.com/dp/B0056ER22E/ref=sxr_pd_sm_se2?pf_rd_t=301&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=2417891702&pf_rd_i=o2+odac&pf_rd_r=1D3AHN63Q2DM76RPW1W7&pf_rd_s=desktop-rhs-carousels&ie=UTF8&qid=1465173818&sr=2
NVX XPT100 Over-Ear and FiiO e12 amp combo or used FiiO e17k DAC/Amp with medium gain combo:
http://www.amazon.com/Perfect10-Over-Ear-Headphones-ComfortMax%C2%AE-XPT100/dp/B0093PVTPS/ref=sr_1_1?s=electronics&ie=UTF8&qid=1465173998&sr=1-1&keywords=nvx+xpt100
http://www.amazon.com/gp/offer-listing/B00RPD7KP8/ref=sr_1_1_olp?s=electronics&ie=UTF8&qid=1465174289&sr=1-1&keywords=fiio+e17&condition=used
http://www.amazon.com/E12-Blanc-Portable-Headphone-Amplifier/dp/B00B6QXWIY/ref=sr_1_3?s=electronics&ie=UTF8&qid=1465174053&sr=1-3&keywords=fiio+e12
Really, it all depends on what you needed more than what you wanted. The K553 are great, but there are other deals, based on what you need. Just as long as you can cancel your order and re-order something, I guess.
Edit: If you do cancel the K553 and buy something else, I suggest the NVX XPT100, used Fiio e17k DAC/AMP, and add some HM5 hybrid ear pads for $25 later...or with the order.
http://www.amazon.com/Brainwavz-Hybrid-Memory-Foam-Earpad/dp/B00ZGGG3KY/ref=sr_1_1?s=electronics&ie=UTF8&qid=1465174433&sr=1-1&keywords=hm5+hybrid