Which rMBP should I keep?

So the last 2 weeks have been kinda crazy for me in terms of Macs.

First I returned my iMac as I felt it was a waste of money for my usage (mainly just Microsoft Office, Web surfing, iTunes, and iPhotos) I'm a very simple user but I love Macs and love the Retina displays.

Then my office was having a huge upgrade project by going completely virtual on the server side and we were moving from desktops to all laptops with externals monitors, we all had the choice of laptops we want and I opt to go for the 13 RMBP since I will have to travel back and forth with this machine all the time.

I've been with this company for a long time and I know my job is safe there, so I decided to sell my 15" RMBP and just use the 13" for work and personal.

Been fine with that and everything is great and all.

Then comes the craziness, I was at some IT professionals trade show for work last week, it was huge and lots of companies were there trying to showcase their product and services.

To cut the story short, I put my business card in a raffle and I ended up winning a 2013 15" RMBP 2.8Ghz 16GB 768GB SSD. Basically the Ultimate max config machine that Apple has to offer at this time.

Now I know this machine is super overkill for my use but its hard to give up something like this.

So I dont know what I should do;

1. Use it for personal use. (the kid in me wants to do this)
2. Sell it. (the adult in me wants to do this, as I can get over $3k for it)
3. Sell the 13" and keep this. (theres rights and wrongs for this)

Thanks,

 

The only problem I have about keeping both is that I won't use them both enough to justified owning both, as i mention I am a simple user who really don't need the power of the Macs but I love the retina displays and slim size of these machines. But keeping both machines valuing almost $6k is kinda silly for just browsing the internet.

My company is a small 20-25 employee firm, so using my work computer for personal use wouldn't be a problem with them or I, they don't monitor anything on these machines nor do they put any special programs or applications in them, as mention above, everything is thru VMware and Office365.

They wouldn't mind me selling the 13" as long as I use the 15" for work, I've already asked about this and theres no problem.
Im not worry about them asking for the machine back as I mention I've been with the company for a long time and I don't see myself leaving the firm anytime soon or them letting me go.

 

Im a Consultant for a IT company, mainly sales. So i dont really write any programs or anything, as mentioned early, my usage is mainly on Safari using Office365, Sharepoint, and Autotask. I use the Office apps to create proposals and quotes, stuff like that. Itunes for my music, and i have a WD external for more media files and backups. I dont even play any video games, other than that i spend most of the time browsing the web.

I guess i answered my own question, the 13 does everything i need it to do.
I dont want to own both machine as it is a complete waste of money.
The 15" is a beast of a machine and I wont notice any difference in performance on the tasks that i do everyday on my computers, the only real difference is the size of the screen and thats about it.

I guess adding $3k to my bank won't hurt