You probably already know the software we use, I'll name it anyway
Skype - 300+ contacts and 50,000+ messages, talking to 20-30 people at any one time
Photoshop
Dreamweaver
30 tabs of Chrome with 2-3 tabs of video
Camtasia for recording video
Dropbox
Bittorrent for download
Firefox browser
Internet Explorer browser
Safari browser
Purevpn
Line chat app
TeamViewer
Filezilla
Music player like iTunes
Antivirus software
Microsoft Office - 3 open at the same time
Requirements
Most of these are running at the same time. We want as little lag as possible, without breaking the pocket.
Start up time as fast as possible. My overpowered desktop can start all these in less than 2mins when powered off, but I'm not sure about a laptop.
Im running similar load on hp probook , i7 quad. You can get the base version with 8 gigs of ram and 750 gb hdd for around 700 bucks ?
Dump in another 500$, install extra 16 gb ram, 240 gb or so ssd as primary hdd and it works like a charm.
1200$ for a machine like that is pretty decent imho.
I have acronis backup running weekly so with restore to dismillar hardware option I can be up on a backup machine with same specs in 1 day
and with only 1kish spent on notebook you dont even have to deal with warranties etc.. you can just dump it 
Can you share more about your usage? Have you tested all running at the same time? How often does it lag? If I open all these applications together how long does it take for all to open? On my overpowered desktop it takes less than a minute, but on my laptop it takes like 10mins
My laptop specs are Lenovo IdeaPad y470. I think it has like 8gb ram, a pretty sad graphic card and for sure no ssd. Maybe I can upgrade it?
Check out the Chrome extension "The Great Suspender" btw it saves a ton of memory that Chrome hogs by freezing your unused tabs.
I recently bought the dell xps 13 2015, and I am very happy with the speed.
The videocard is so strong that you can connect monitor(s) with very nice resolution. Therefore great for office and travel
I am all macbookpro as far as laptops go. Nothing is better in my experience. For desktop still pc.
Macbook Pro all the way.
And iMac 5k for desktop.
If you love your eyes I highly recommend it.
I read a lot and feel no strain after 6+ hours staring at the monitor.
Any text literally looking like it's on paper. Very close at least.
Thanks guys. I'm going to check if ssd is the bottleneck and if that's the case I'll just replace that part and keep going and then upgrade again at a later time. I just need things to run faster and not hang and lag
I've used PC laptops exclusively for 15 years. Last year I had to get a MacbookPro to work with my audio software, which doesn't run on PC's. I hated it for two days, but after getting used to the keyboard shortcut changes and other differences, I fell in love with it. I now greatly prefer my MacbookPro to my highly capable PC laptop. (I think this story has been told a million times.)
I still use my PC laptop for work exclusively, because I am using my MacbookPro as a dedicated audio machine. Even though my PC laptop has zero performance issues (literally, zero -- it works great), I would always prefer to be on my MacbookPro. Once this PC dies, I will replace it with a Mac, no question.
Hey Xavier! Definitely try the SSD upgrade man... whilst I've not upgraded to SSD in the past, I know of people who have and says it makes a world of difference. 8GB is still not bad....
My laptop was recently in need of a serious upgrade and affecting my work and basically on its way out (plus super heavy!) - I had trouble deciding between a Dell XPS 13 and 13 MPB and chose the MPB - Really happy with it and got the new 2015 for a great price with my sister's student discount although there are usually decent refurbs that will do you just as well.. It's also a lot lighter than I initially anticipated and the battery life is unreal (if you avoid Chrome on Mac!)
just tested the SSD, its magic! problem solved