what i write below only applies if you're talking about buying another resale (assuming your Feb VWL goes through), and you are dead set on buying a 2nd use year to maximize your vacation flexibility.
then IMO the best bet would be to buy a UY that is 6 or 7 mos away, i.e. Aug or Sep.
my reasoning is that every use year will cover the first 6 - 7 mos very well in terms of if you need to cancel your trip last minute, and want to be able to bank 100% of your points. (remember you must cancel 31 ore more days ahead in order to avoid that dreaded holding acct)
so if you want "coverage" the entire year, then 2 separate UYs that are 6 - 7 mos apart is the way tot go.
i say this because vacation habits are impossible to predict for the next 30+ years.
i do want to warn you that your Feb UY is not very good for Thanksgiving trips, since those trips will always fall towards the end of your UY.
if you only buy a single UY, and really only plan to travel April and Thanksgiving, then an Oct UY would be the best.
hope this doesn't confuse you more. heh.

sometimes i type the same reply to UY questions over and over, so i thought i would try sometime different this time.