I play RTS games including Starcraft on buckling spring keyboards all the time with no issues. For RTS games, it's nice to have that affirmative action.
The buckling springs are more tactile than the Blue Cherries, and lack many of the Blue Cherry's problems, like the pronounced hysteresis gap (i.e. the double-tap issue) and general fragility. On the whole, I think they're a definite step up.
The seller you linked is someone I've bought stuff from before, I recommend him.
Buckling springs are really very different from Cherry blues. They require more force to actuate and in me experience, some boards have a really annoying "ping" sound when you release the key. Furthermore, while both boards are clicky, the model m is much louder. I would see if you could find a model m a little cheaper just in case you don't like them. I tried for a month to get used to one and I just couldn't do it.
The ping is a sign of popped rivets, which can be rectified. They are
somewhat louder than Blue Cherries, but the sound is less distracting IMHO.
If you are short on money right now the Dell AT102W is a great alternative. It uses black ALPS which are tactile and clicky; closer to cherry blue and they are generally cheap in every country.
Black Alps switches are not clicky - they just make a lot of noise because they bottom out so hard. They're also quite tiring to type on in my experience. They also don't age well, so getting an decent old one is down to pot luck.
For gaming, specifically SC gaming, I do think blues are better. The heavier feeling of BS sorta gets in the way in a game where you're often spamming single keys. Keep in mind though, it's not like it's impossible or even unpleasant to play on a BS. It's just that a mx blue will be better.
Unless you have some magic version of the Blue Cherry that doesn't have the double-tap problem... No...
