Lenovo ideapad y510p SLI vs y510p non-SLI?

I'm thinking of buying the Lenovo ideapad y510p particularly for gaming, but also for school since I'm in highschool so I'll need it to write essays and stuff. Anyway, I found two models of the y510p that looked good. The first one has no SLI, but has an optical disc drive, and for some reason I love collecting covers of games and movies and things like that, so that would be really good for me. But I've heard that the SLI model (with obviously no disc drive) has way better performance on graphically demanding games. Here are the specs:

Non-SLI Model:
Prossessor: 4th Generation Intel Core i7-4700MQ Processor (2.40GHz 1600MHz 6MB)
Graphics: NVIDIA GeForce GT755M GDDR5 2GB
Memory: 8.0GB PC3-12800 DDR3L SDRAM 1600 MHz
Hard Drive: 1TB 5400 RPM + 24GB SSD
Optical Drive: Blu Ray/DVD
Network Card: Intel 7260 b/g/n Wireless (2x2 BGN)

SLI Model:
Prossessor: 4th Generation Intel Core i7-4700MQ Processor (2.40GHz 1600MHz 6MB)
Graphics: NVIDIA GeForce GT755M (SLI) GDDR5 2GB
Memory: 16.0GB PC3-12800 DDR3L SDRAM 1600 MHz
Hard Drive: 1TB 5400 RPM + 24GB SSD
Optical Drive: Ultrabay SLI Graphics - NVIDIA GeForce GT755M GDDR5 2GB
Network Card: Intel 7260 b/g/n Wireless (2x2 BGN)

Do you guys think the SLI graphics are worth giving up the DVD/Blu-Ray Drive? Thanks!

Added (1). Sorry guys just to clarify-Since I'm 14 and going into high school I'm going to need a laptop anyway, so I can't get a desktop. To David, thanks bro good answer, getting a desktop was my first choice but I couldn't do it bc I need a laptop.

http://www.notebookcheck.net/...849.0.html
gaming performance rank #38 for gt750m sli and rank #86 as a single card.
The module with the extra graphics card replaces the DVDRW and they are interchangeable, but the graphics module is generally $269.
You can buy a USB DVDRW for under $50 or bluray at under $100

SLI is definitely more powerful. But probably a smaller frame improvement. If you don't have a problem paying more than go for it. The disk drive is useless nowadays. Especially since Steam has taken over games, meaning no disks (which i'm sure you know).

You should build a desktop yourself. Gaming laptops are not usually a good value. Usually a single card is better because not all games are optimized to use both. So that extra money is useless. You could build an amazing desktop for around $1000. It's upgradeable and would blow the doors off that laptop. If you need to save money a GTX 760 would be good too. You don't have to buy an operating system because you can "acquire" windows 7 other ways and install it via flash drive. There are plenty of videos online showing you how to build it.

http://pcpartpicker.com/p/3cRHr