Your plan sounds solid to me and is in fact very similar to what I've been doing for the last eleven months. I grabbed my A+ and NET+ not because I needed them for a job but I want to make sure I'm well rounded and have a good foundation before I go onto the fun stuff like pen-testing. I'm taking the CISSP next month and will knock out the CEH this summer for the same reason. For once I'm having an ounce of discipline
I haven't taken the eCPPT course or the OSCP course but I'll be taking them both within the next year. The general consensus is that eCPPT is much friendlier for those starting out (especially if you do the student before the pro) and does a great job preparing you for PWB and OSCP.
Honestly, we'll probably both be in the same boat as far as we could probably go do OSCP and make it but it would be more painful than if we did eCPPT first. Don't get me wrong I know it's going to be painful no matter what but maybe if we do eCPPT first than OSCP will make us want to cry but not actually cry.
What I've learned this past year is that if you stick to well respected courses and certifications their are no bad choices. You should strive to do them all, it's just a matter of what order you take them in (based on your interest and goals) and at what speed (based off of finances and free time).
GCFA, GCIH, GCIA, GWAPT, CISSP, CEH, GSEC