One thing: Mechanical Keyboard
How much time do you spend at a computer? Why not spend some money making that experience a bit nicer.
Plug for /r/mechanicalkeyboards , I'd visit there before you choose which switch type you want.
So... I would recommend a laptop that you can dock and can do some virtualization.
You can upgrade the memory to 16Gb and then get a port relicator for multimonitor setup.
http://www.overstock.com/Electronics/Dell-IMSourcing-NEW-F-S-430-3114-Port-Replicator/9048000/product.html?refccid=5XI2HQKY4AW3H2KC6MHEQQND6I&searchidx=0 I recommend this one because it has 2 DVI ports, vga, hdmi, dsub, 5 usb (2 back, 3 side), and basically everything you need in a port replicator.
Those particular laptops come with a 256GB SSD (Samsung, Seagate, or some other vendor, just depends but I've found most use Samsung and Seagate).
You can get 16GB kit would should be plenty for most virtualization and the 2.7GHz has hyper threading as well.
Wireless is I think the Intel 7620-AC Dual band but there is an additonal slot for a secondary card. (I think there is actually 3 slots total but only enough wires for 2 cards).
Network is 10/100/1000
You're going to be hard to find a better laptop with all that for cheaper. Brand new these things run around 1200 - 1500 depending.
Now the only thing that really bugs me when buying those is it's going to be a grab bag on whether you get a 9w (extended battery) or not.
If you don't get a 9w battery then I'd recommend picking one up.
The monitors and everything else is up to you but that would be my recommendation for what you're looking for.
Edit: Forgot these are also super easy to take apart. 7 screws on the back and the panel comes off super easy.
Edit 2: Also, because those sell out, make sure if you go on overstock that the processor is the 2.7ghz i7 if you want to do virtualization.
Also here is the specs on the processor that come with it.
http://ark.intel.com/products/52231/Intel-Core-i7-2620M-Processor-4M-Cache-up-to-3_40-GHz
Edit 3: Sorry keep forgetting things. Those laptops come with some shitty chinese replacement chargers. They can cause issues with the touch pad while charging. However the port replicator (docking station) should come with a legit Dell charger that will work for the laptop as well since it's universal.
Edit 4: Decided to add my personal recommendations for monitors, monitor stand, mouse, and keyboard. You do your own research though.
Monitor x3: Dell E2414H - 1980, Vesa mount, DVI and VGA http://www.amazon.com/Dell-E2414Hr-24-Inch-LED-Lit-Monitor/dp/B00FE8MKTM/ref=sr_1_2?ie=UTF8&qid=1450473050&sr=8-2&keywords=dell+24+e2414h+monitor
Monitor Stand: 3 Arms I'd go with http://www.amazon.com/Ergotech-Triple-Horizontal-Monitor-100-D16-B03/dp/B001NPEC5A/ref=sr_1_1?ie=UTF8&qid=1450473096&sr=8-1&keywords=ergotech+3+monitor
There are a lot of options with monitor stands but I like Ergotech so YMMV
Mouse: Tons of options but for I really enjoy my G602 http://www.amazon.com/Logitech-Wireless-Gaming-Mouse-Battery/dp/B00E4MQODC/ref=sr_1_1?ie=UTF8&qid=1450473201&sr=8-1&keywords=logitech+g602
Keyboard: I love blue switches and having a numpad on a TKL is amazing. CoolerMaster has some pretty amazing mechanical keyboards. I recommend this one. http://www.amazon.com/CM-Storm-QuickFire-TK-Mechanical/dp/B00A378L4C/ref=sr_1_3?ie=UTF8&qid=1450473227&sr=8-3&keywords=cm+rapid+fire+tk
Otherwise I currently use a the Quick Fire Rapid with blue http://www.amazon.com/Coolermaster-SGK-4000-GKCL1-US-Storm-QuickFire-Rapid/dp/B0068INSUM/ref=sr_1_1?ie=UTF8&qid=1450473343&sr=8-1&keywords=cm+quick+fire+rapid+blue
I recommend browsing on https://mechanicalkeyboards.com/ or /r/mechanicalkeyboards
I use this mechanical keyboard with Cherry MX blue switches. I actually own two of them.
There's nothing quite as pleasant to type on as a good mechanical keyboard, and most people find that the tactile (and in this case, audio) feedback helps improve typing speed and accuracy.
If all you've ever typed on are cheap membrane keyboards, the kind you find with virtually all computers, a good mechanical keyboard will be life-changing.