a collection letter - what should I do?

I have received a collection letter.

What had happen is last November, I lost my job. I have to move out an apartment earlier.

I have paid off all my rent.  The leasing office want  to collect earlier termination fee: $585 + moving special pay-back ($400) + 10 days rent ( $188).

The $400 special pay back is what they have added to lease the last minute before I signed the lease. At that moment, I have already declined other offers from other apartments. I didn't have other better choice but signed the lease.They said the 10 days additional rent is because I have moved out  on Dec 10, but in fact I moved out on Dec 1 and I have turned in keys that day.

I don't want to affect my credit. My credit is excellent, but I want to stand for what is right. I want to pay what they deserve.

Credit Bureau suggested me to just pay. Otherwise it will go to my credit report. If I choose to dispute, that will also goes to my credit report and affect my credit even I am right. I wondered if that is true.
So what is the best thing I should do?

1. pay the bill, but make sure it will not be reported to credit agency. but I doubt it was done already.

2.if you do not care about your credit,  just ignore it. but it will be on your credit report record.
      They are asking too much.

3. if you pay for it, your credit still suffers the damage, but less than the first option.

either way, you are bullied by the apartment and the collection agency

你可以跟他们协商只付585。他们应该会同意。如果不同意，你只有自己选择了。如果报credit bureau，分数会降到720以下。贷款时会多付1%的point。

谢谢1楼和2楼的建议。

如果必须作选择的话，我觉得宁可损失几百元，保持好的信誉更“有利”一些。只是我对Collection Agent 的话有些疑惑。好像只要我不马上交钱，不管谁对谁错都会影响我的信誉。那样的话，对方不是可以抓住这个弱点，为所欲为了吗？Collection Agent 是不是只代表对方的利益？

谢谢，
--  楼主