I've sent "CQ test" numerous times with no response.
Well I wouldn't expect any replies if there wasn't a contest
going on. Bet most folks would think "Contest? What contest?
Since I don't know the exchange, I'll pass this one by".
(Assuming your ARE getting out) Try "CQ Radio Check".
And yes, the meter you linked to will work fine.
Although, seriously, you needn't spend that much money if you
don't want to. I have $200+ meters and $5 Radio Shack
hamfest meters, and there isn't a whole heck of a lot
of difference for "just checking if I'm putting out a signal"