Thank you everyone for your comments and suggestions! I was able to read through all of them and have a lot to process on what I should do. Right now I am all of the place and am now considering a used 17-40 F/4 L or a used 24-105 F/4 L IS. I think the 17-40 would be better for me right now because I enjoy landscapes, however being at only F/4 scares me and think the IS would be a nice feature. After much research my end goal is the new 16-35 F/4 L IS, what a nice lens for a landscape photographer! However I can purchase the 17-40 for almost have the price used. Does anyone have any experience with any of these lenses? I like the prime ideas, however I fill it it a bit limited for and I may just keep it at the 50mm 1.8 for the time being. Again, thank you for your responses to my thread!
I have owned the 50/1.8, and replaced it with the 50/2.5 macro. This week I tried a 50/1.4 belonging to a colleague and was impressed. It also seems to focus significantly closer than the claimed 45cm.
If the 16-35/4L is your long term wish, then Mt Spokane's suggestion of the 18-55 STM might be the way to go now, releasing some budget for a better 50 (faster, better AF) that remains with you for the long term.
Alternatively to a 50, the newer 40 STM reviews well, as does the 24 STM. However, neither will give the degree of subject isolation that can be had from the 50 1.8 or 1.4
I appreciate the budget juggling dilemma. It never goes away, the numbers just get bigger when you go from a student budget to a wage earner's budget.