Dude, you've got Targa's and you are considering Flows? Shake your head!
Unless you like less support, cheaper quality, and catching your dropped highback on the loading gates every run...
-- Edit --
If you want a slightly quicker entry, check out any K2s with the Auto system (ie: ever, drone, uprise, etc). They are sick.
Out of curiosity, what is your experience with Flow bindings? Year? Model(s)?
I find your comment highly suspect because of your "quality" comment. And if you catch your highbacks on loading gates, then that's your fault. Flip your damn highbacks up when you are skating around.
Flows are some of the highest quality bindings. The malfunction problems arise from the number of moving parts. Any binding with that many moving parts have a higher chance of failure. With that said, in my experience, most of the failures that I have seen are due to user negligence. That's actually the same exact case with traditional binding users. Always, always check your hardware before your sessions. Hell, give them a brief inspection every now and then when you strap out. I do that to this day even with my traditional bindings. Screws loosen up over time, it's just a part of the grind. I always have a pocket tool on hand for this reason.
Also, the sheer volume of Flow bindings out there causes it to look like everyone and their mommas have a failure with Flows. You'll have the same experience with Burton horror stories. It's all about ratio.
I don't really recommend Flows for the speed entry. The reason I love using them around small hills is not because I'll squeeze a few more runs in (I can squeeze in a few extra runs if that's my focus), but because I do not have to bend down half as much. This is especially nice since I'm getting old haha. I was at the point of being able to strap in as I skate off the lift.
Another reason I loved Flows were for the comfort. The strap design of the Flows distribute the pressure evenly across the top of your foot. This really reduces the fatigue. Also, this design gives you more edge to edge response. Lateral flex isn't as good as traditional bindings though, but they do have rocker baseplates to help.
The reason I no longer use Flows (for now) is because of the lack of canting. My left knee bothers me now and canting really helps relieve this issue when riding. Also, current cap strap designs have gotten much better so traditional bindings are pretty comfortable in terms of foot pressure.
Sorry for the essay, but tend to go on rants when people jump on gear advice threads trashing an entire brand line without giving valid reasons as to why.
By the way, Flows take a lot of time to adjust and some time to get used to. If you are transitioning to Flows from traditional bindings, you just might find it to feel like crap at first. They definitely have a different feel and response to them. If you can demo them, give it more than just a couple of runs and really try to dial in the fit. Remember, you don't have to crank the cap down so tight with Flows.