Aaron,
it is difficult to give you a valuable advice ...
If you can >>> test PC with faster CPU, but I am not sure that an improvement will be worth of spent money. Maybe overclocked desktop PC will provide more power ...
It looks like the problem is related to drawings. My suggestions follow:
1.] do not use multisheet drawings
2.] when you are working on drawing - use selection filters (see bottom right corner of window)
3.] when you are working on drawing - use Erase command to "suppress" unimportant views temporarily
Good luck
Martin Hanak