If you havent gotten into all grain yet, I would 110% do that! You'll never regret making the jump. Cheaper ingredients, more control, better product! Really, all you need is at least a 40qt cooler to convert to a mash tun (about $40) or you could buy one premade from a HBS.
I posted a similar question a couple months ago and the best response I got was 'Mentally, go through your brew day, figure out what part of the day is the biggest pain in the a** and fix it!'
Think wort chillers, extra fermenters, cappers, bottle trees, extra kegs, another cO2 tank, maybe a pump... make life easier!
Worst case scenario, i can give you my PayPal info, and you can share the wealth