700cc Tank or save for a 6.8L?

Curious on thoughts regarding upgrading the 580cc tank on my FX Maverick (.25) to A 700cc bottle? If so, what brand would you recommend? Not sure about the Tuxing brand, seems reviews can be hit or miss - especially considering the price. I noticed the AirMarksman, but that seems to be out of stock everywhere I’ve checked.

I’m a little concerned swapping tanks regularly would cause wear & tear on the o-rings within the bottle adapter. Considering the amount of shooting I’ve been doing, I’m feeling like I refill a lot more frequently and figured if I could get double my shot capacity with a second tank, then it’d be a little easier on my compressor.

My other option would be to disregard the 700cc and save up for a 6.8L (I’ve got the GX CS-4 and should have no problems filling it). Similarly, what brand would y’all recommend?
 
Depends. Is a lot of your shooting done from a table or bench? If so, I'd get the biggest tank that you're comfortable carrying to where you shoot. This will also allow you to shoot other airguns if you have or ever get more.

If a lot of your shooting is done on foot carrying just the rifle and some pellest/slugs, I'd go for an upgraded tank
 
Thanks @Asher! My typical retort would be “Depends is a diaper”, but I find more often than not each situation is dependent on something 😉

My predicament is that I’m about 50/50 between the bench and walking around. The bench is primarily for tuning, sighting, and most of all tinkering. And as much as I’d like to get another rifle, I’ve only got the one for now.
 
For what it's worth, large tanks also have other uses like filling car or semi tires. I have an inflatable boat that I fill with mine. Also take it camping to blow on the fire and get it going faster.
I‘ve got a small pancake compressor at the house and another small one that fits in my “emergency kit” when traveling for my tires and typically stick to gasoline to kickstart a fire when camping 🤣

Do you travel with the large tanks already filled or bring a shoebox compressor with you when traveling?
 
Usually I have both my tank and my gx cs4 compressor
Unfortunately, I set my CS4 up at home that makes it “not so portable”. I I get a tank, I’ll likely need a DOT stamped one.

Anything I should be aware of when using my CS4 to fill a larger tank? The filter setup I’ve got adds some time for me to fill my 580cc tank from ~120 to ~275…