No problem my friend! I'd definitely lunge for a combo if you can snag it, just be sure to check warranty information! I'm not sure if the warranties on the two items would be different if sold together, but it'd be something I'd look at. I'd also take a look at adding an extended warranty of some kind depending on the price, but sometimes on PC hardware it can be $100+ so would be a decision for sure.
And definitely man, do what makes you feel more comfortable in terms of cooling. The wraith is more than adequate and does a solid job from what I've read. Closed loop liquid coolers these days seem about as easy as most regular air coolers, just a large black slab to screw in; however choosing an AIO (all in one) can be hard with so many choices! I say rock the Wraith!
Enjoy that sweet gaming glory! All hail the master race! All hail the master race!