Sort of hard to answer without knowing some info about the rest of your system.
What motherboard/chipset, PSU, GPU, etc.
Where it's doubtful that your GPU/PSU combo are at such a limit that the extra power required would matter....the quality of the VRM and chipset of your motherboard do.
If you have any of the 3xx series of motherboards you will need to do a BIOS update. The 2700x should at least RUN on any of the chipsets once that is done. Headroom for OC'ing would be dependent on those VRM.
Aside from that, yeah some alcohol, wipes, and thermal paste. If you are going to use the stock cooler for the 2700x find those standoffs that you took off the mobo….if you went with a tower cooler of most any level of quality it should work fine for the 2700x as well, particularly at stock clocks/levels.
For the pricing available for the 2700x it's currently one of the better deals on the market for price to performance. Should be a nice bump.