We went the VP jug route when we started due to limited budget and Hunsaker cost. We've upgraded our VPs over time and don't see the need for Hunsakers at this point, but then we aren't in contention for a Class A or B win any time in the foreseeable future. If your budget is unrestricted, the Hunsakers are the way to go. Since you already have VPs, I have a few suggestions.
If you want to greatly speed up your VP jugs, look for 3/8" or 1/2" "through-hull brass fittings" on ebay or Amazon. They will flow far more air than the factory port. Use good fuel proof washers on both sides - Viton if you can find them, Nitrile would be second choice). Cheap washers won't seal for more than a couple of days and your jugs will leak next race. You can buy clear PVC hose at Lowe's or Home Depot. Put the vent pretty high up. Drilling the hole is easy, the hardest part is finding someone with small enough hands to reach inside the VP jug mouth with the inside of the jug part of the fitting and then getting a wrench on the fitting and ensuring the fitting is tight. An 18" to 24" vent hose can be bent down from the fitting and zip-tied to the handle. A vent tube from the inside fitting to the bottom of the jug will help, too. That smooths the airflow instead of having it bubble up through the gas. If you use the inside vent tube, be sure to loosen the stock vent cap slightly when the can is full and in the sun at the track - and of, course, tighten it completely before heading to the pit to fuel. Loosening the stock vent cap will prevent the can from pressurizing as it heats up in the sun and self-siphoning the fuel out of the can and into your drip pan or fuel wagon (speaking from experience).
As mentioned, test with water, then dry out and test with gas in your daily driver or tow vehicle so you won't have surprises at the track. This is an easy mod, and will make a noticeable difference in your fueling.
You can gain even more time by going to a larger fuel tube/cap at some point in the future when you think it may further help your pit times. And by "further help your pit times" I mean after several races when your team has gotten a good handle on pitting duties, focus, and efficiency, because those areas are the real low-hanging fruit. You can bore out your fuel filler port with a hole saw to accept larger diameter fuel hoses and use larger through-hull fittings on the fuel jug caps. We did that and found a 1 1/4" inside diameter fuel hose flowed faster than our car's stock fuel system could accept due to it's plumbing and vent design, and had to back down to 1" filler hoses. Since the flow rate increases dramatically with the hose diameter, a 1" hose flows way more than a 3/4" hose does. However, don't get carried away on that end - I have heard rumors that Lemons may limit fuel hose diameters soon. I'd think that was aimed at the teams using 2" and 2 1/2" fillers in their fuel cells, but can't say for sure so don't rush on that mod.