Forgive me, but it really depends on your philosophy of tracking purpose of the OH's.
Many a great recording has been made with 3 mic's on a kit, as well as mic-ing everything on the kit... e.g. 16 mic's and the kitchen sink on a 4 piece kit. :-?
If you prefer the sound of OH to be primarily cymbals, then SDC's like SM81's, NT5's etc, are a nice choice.
Blumlein'd ribbons, 414's, C12's, U87's, etc. not only capture the cymbals, but will also capture your entire kit's sound to where you really only need to suppliment the OH's with close mic-ing techniques.
Heck, in a pinch... 57's will do the job of capturing cymbals in a spaced array.
Which also brings up the mic technique... spaced array, X-Y, Mid-Side, Decca, and Blumlein... Many SDC's are usually a tad tricky to get into a Blumlein. Decca arrangements require 3 mic's. Mid-Side requires a figure 8 and an omni... which in your desire for a matched pair, sounds like you probably are not interested in.
It's really up to you, your desired sound, and ultimately, your budget.
As far as matched pairs go... there are few, truly matched pairs on the open market. Sequential S/N's may or may not be a matched pair. They may be close to each other, or they may sound wildly different. Though this is probably truer for budget mics than for higher end mics.
To get a truly matched pair, you will either need to buy them from a reputable manufacturer as a special order, purchase them used from a reputable seller, or purchase a pair of the same unit and send them to a reputable tech service/manufacturer for matching process.
[edit to correct spelling error's of a major OOOPS... e.g. Blumlein]