B&H Photo is currently selling the Dell P2715Q 27-inch 4K Monitor right now for just $399. That's good for $100 off of the regular price, and this price is also only good through March 4th, so you have just a few days left to pick one up, before the price goes back up.
This monitor from Dell is a great pickup, since it is a 27-inch 4K monitor, which is going to be great for being productive. It does also have a few ports available including a DisplayPort, a mini DisplayPort and a HDMI port. It's also an IPS panel, so it's going to look great, and in bright environments, it won't give you a ton of glare either, which is also a good thing. It does also have a couple of USB ports, and a 3.5mm jack for plugging in headphones. There are speakers integrated here, but they aren't going to be fantastic, so you may still want to use a pair of studio monitors on your desk for great audio.
At B&H Photo, you do get free expedited shipping, and if you purchase before 4PM EST today, it will ship from its New York City warehouse today. There's no taxes being collected unless you reside in the state of New York or New Jersey.