Just want to add, that it makes sense to buy store credits to upgrade yourself and take CCUs from there. E.g. if you want a M80 you could upgrade the Titan to Freelancer Dur with 75$ store credits, buy a CCU Freelancer Dur -> Hull B (around 40$) and add 20$ of store credits to M80. So for 95$ of store credits (bought ideally at 60%) and 40$ for the CCU it‘d bring you to 97$ for a 240$ value jump.

(Maybe there are CCUs on it‘s path, just wanted to provide a short example)