Need advice on solid gaming rig $2000-$2500

So i finished building a gaming rig about roughly a year ago and was robbed 3 months later. I haven't had a computer since, so i haven't been able to stay up on parts etc.

im looking for a nice gaming build that justifies the cost. i dont mind forking out a little extra cash for some bells and whistles but would like to stay as close to $2k as possible with core components + monitor. i prefer a quiet machine and plan on overclocking. 120hz monitor with good response and a minimum resolution of 1920x1080 is a must but if a better resolution is an option, even better. also 27" is the lowest i want to go. basically just looking for a nice gaming rig. i appreciate any help i can get. i just want to be sure its compatible, im not wasting money on useless parts, or risk bottle necking somewhere by skimping on a necessary component.

please excuse my typos, punctuation, and grammatical errors. It's been a while since ive actually used a physical keyboard instead of my phone.

Approximate Purchase Date: buying parts from the end of april through end of june

Budget Range: $2,000 ish prefer not to deal with rebates.. 2500 is the absolute max when including accessories like nice headphones, or a blu-ray

System Usage from Most to Least Important: High End Gaming, possibly blu-ray

Parts Not Required: Everything is required in the budget however im not picky on the keyboard, i will choose my own mouse within 60-100$ range, and i plan on using an n52 by razer. also a 27" 120hz monitor with around 2ms response is a must. not sure on which monitor is best though.

Preferred Website(s) for Parts:new egg preferred

Country: USA

Parts Preferences: i5 2500k is a must, will be doing significant oc so i would like good cooling preferably quiet, need advice on a good monitor, 27" with 120hz 2ms response is a must, prefer good nvidia card. a decent soundcard as well unless board has solid integrated sound. if a high end headset can be recommended it doesnt have to fit into the budget. would like a nice hdd setup if possible

Overclocking: Yes

SLI or Crossfire: no

Monitor Resolution: 1920x1080 unless recommended monitor supports higher.

Additional Comments: dont care about led's although in the event i could achieve a nice red glow with matching board etc... that would be pretty sick..