trewyn15 wrote in post #16474617
As you can tell I kind of prefer to do cars, but I do nature as well. I haven't done much sports, but I have done some. I'm fairly new to photography, but I can see the limitations of the lenses already, especially the kit lenses.
It would be helpful to know what the limitations of the kit lens are for you. Is it too slow? Not weatherproofed? Focuses too slowly? Not a fixed aperture? Also, given the shots you posted, I'm a bit surprised you don't want a lens wider than 24 mm; I'd have thought wider angle capability would have been something you wanted, especially for the car shots (which are great, by the way!).
There are several possible replacements for your 18-55, but none of them will automatically produce a huge improvement in image quality. The "L" lenses usually offer better build, weatherproofing (although not always), faster focusing and better colour/contrast rendition. But the difference isn't always easy to spot in the final image. Until recently, I owned a $150 Canon 55-250 and a $1000 Canon 70-200 f4 IS. I could show you my processed images taken with both lenses, and you'd find it hard to say which image came from which lens. What is different is my keeper rate (the 70-200 focuses much more quickly and I get far more usable shots of moving subjects - the reason I bought it), and the conditions in which I'm able to shoot. I also enjoy the fixed aperture of the "L". Bottom line, if you're choosing an "L" lens just for the image quality, you might be disappointed.
So before spending the money, it's important to know exactly what you expect. Also, a couple of years seems like a long time to use a lens that isn't exactly what you want on your current camera. You're going to buy used, so you could easily get a lens that will do the job for you now, then exchange it for something else if or when you eventually change cameras.
In any case, good luck with your choice, and enjoy!