I'm guessing you work armored car/security?
For practicing drills and general range use, as well as IDPA/IPSC, I use a regular Blade-tech. Same thing for non-work courses I've taken. I'm looking into a couple other options though....
Work stuff is a different story.
The only reason I can see someone getting the serpa over a Blade-tech for playing with at the range is because they're cheap. And they've seen army or cop dudes using it and they think its cool.
Cool to have 30+ oz of dead weight bouncing off your leg? Man it must be cool. Probably about as cool as wearing body armour over your shirt when it is 40C outside and you got some lady asking you why you aren't out chasing real criminals instead of giving her a ticket for only going 30K over the speed limit.
Take Care and good luck in the Ontarios.
Bob