Originally posted by crossover37 sometimes hangs when I apply actions in Photoshop
If your laptop truly "hangs" while editing (i.e. freezes and does not complete its task, requiring you to start over), or it's painfully slow but didn't use to be...something is wrong with the laptop (probably OS/program bloat). In those cases: fix the laptop and use the money on a new lens.
I use a different flavor of the following comments all the time on a field audio recording forum I moderate (and I've seen Marc pose a similar comment elsewhere on PF):
Before deciding on new gear (lens, body, whatever), I think it's helpful to ask oneself: what characteristics do I like, dislike, or not currently have (but want) with my current gear? The answer then becomes: how do I and what compromises am I willing to make to acquire or get rid of those characteristics? The answers to those two questions will provide a reasonable guide forward.