I haven't used FCP X but I heard some things about it. I can't give you a comparison of the two so maybe some pros and cons of getting Premier Pro that I came up with will be helpful.
Pros:
Adobe Creative Cloud is soo good!! (but a bit expensive) Premier Pro and Photoshop alone are great but there are other apps;
hey, you wanna do some fancier edditing? BOOM!!!! After Effects,
wanna do some cool designs for you channel? Boom!!! Ilustrator
fancy some professional colour grading on your videos? BAAM!!! SpeedGrade
having some serious audio issues? KABLAMMO!!! Audition
I think I proved my point, CC has soo many applications that are very well integrated to work together.
2. More people in general use Premier Pro. I'm seeing a general trend of people moving from FCP X to Premier Pro, professional film-makers such as Casey Neistat often speak out about how buggy FCP X is. Possibly using Premier Pro will be beneficial in the future when collaborating with other people on videos.
3. I used Premier Pro for few moths and I haven't had any issues with it.
Cons:
1. In the long term, it will end up being more expensive. In the UK, if you buy it alone it's £17 a month (on a year contract) or £27 monthly, I don't know the equivalent in New Zealand but you can check it on their website. If you want the whole package (Creative Cloud) it will be £45 a month.
Maybe it's worth dealing with all the buggs if it's going to save you a bunch of money
(It's possible to get it cheaper if you're a bit sneaky about it

)
2. You will have to learn a new editing software, they are very similar but new layout, new workflow and new keyboard short cuts take some time to learn.
When it comes to what's better for editing there is no clear winner, it all depends on your needs and preferences. If you were a professional film maker working with a team of people then Premier Pro is probably a better choice but in your case it's all about whether you're willing to pay more and spend some time learning new software.
I hope that helps, make sure to update me on your decision!