It comes down to this. For all intents and purposes, unless you really need a lens to fill a specific need or want. All lenses, even the cheap ones, especially newer models, you probably won't notice a huge difference in image quality. What you end up paying money for is build quality, durability, sealing, constant aperture.
Example. Take two lenses, 85/1.8 and 85/1.2, one cost $400 one costs $2000. If you set the 1.2 at 1.8 and compared, many people would be hard pressed to see a difference. So why pay $1600 more? Some people want 1.2, the want the L build quality and reliability, to them its worth it.
What the point I'm trying to make?
You have one decision, is the 18-55 range enough or do you want a single lens to cover a larger range.
When I first started, I got an XS, 18-55 and 55-250. Next bought a 50/1.8. After shooting a lot I realized I needed a better body and I hated switching lenses, so I sold it and got a 60D with the 18-135. After shooting for a while, I found that lens too limiting and wanted sharper so I sold the lens and get a tam ron 10-24, upgraded my 50 to the 1.4 and got a tamron 24-75/2.8 and an 85 1.8. Soon I realized the 10-24 wasn't good enough so I sold it and upgraded to the canon 10-22. Fast forward to now, I've come to realize I love taking portraits. Its the only thing I really love shooting, so my focus moved to a full frame body and primes for stellar sharpness and shallow dof.
Long winded, but you will find your direction changing, we don't know what you want or need, and at this point neither do you. You need to pick a direction and if it doesn't work, sell the gear and get something else.