It depends on how you use your computer. Full HD means a high resolution screen (generally 1920x1080 or more). High resolution screens are better for multitasking, graphics work, and photo editing. They also can show more details in HD movies, videos, and games. However, high resolution screens also make text and websites smaller and more difficult to read. Also, games run more smoothly on lower-resolution screens due to less work needed by the graphics card.
You are ordering a computer with a high-end graphics card, so most games should still play well with a Full HD resolution. Still, you should consider the positives and negatives of a high resolution screen as detailed above and decide if the advantages outweigh the disadvantages (and the extra cost).
