Which HPA tank?

Hey, so I've posted a few questions on C02 vs HPA here, and you guys have convinced me to upgrade my 20oz to an HPA tank :D , my question now is really which pressure and size HPA tanks you guys have used and which ones you like. I mainly play speedball nowadays, but I still go woodsballing with my friends from time to time. Because I use a bulky 98c for both speedballing and woodsballing, I want a small tank so that it's a bit easier to tuck into bunkers and keep a lower profile. I also don't like having to refill air between each game, maybe only once every 3 games would be best. Can anyone recommend a good brand/ci/psi for me? Also, I'm getting a egrip for my tippy, thus the reason for upgrading to HPA, but I still don't think I'll be firing above 10 bps at any given time. I go through maybe 50-250 paintballs per game depending on how aggressive I play/how long I last in the game. Thanks in advance!

Both seem fine. Nice option with the one of being able to set it for low output in case you change to a marker that needs low pressure.  A quick way to figure approx shots is to multiply the CI on 4500 tanks by 15 and by 10 for 3kpsi tanks. For example a 68ci/4500psi tank would be approx 1020shots(stress approximately) A 68ci/3k would get 680. Several factors can effect your efficiency, but these are good ballparks. Carbon fiber is the way to go for weight, but you will have to get a tank cover to protect it.