HPA help

Ok first this is what I have;
Tippmann 98 Custom Platinum Series - ACT Electronic (E-Grip), Tippmann 98 Cyclone Feed System, and a Tippmann 98C Flatline

Now I currently use a 20oz CO2 bottle, and I've been looking around for a few weeks for info about HPA and how it will effect my style. I play woodsball as a 'heavy gunner' and I go through a lot of paint. I know CO2 is not consistent, so we dont need to get into how bad it can be (reason why I want to make the switch).
Would a HPA system be able to keep up with my cyclone like CO2 does?
Also if anyone has the same or close to my setup and uses HPA, which tank would be the best size? I would like something that can equal the 20oz bottles. I've been reading a lot of conflicting reports that a 48 / 4500 will equal a 20oz, and others saying a 72 / 3000 will do the same. And others say it depends on the marker its self and the way its setup to run.

So if anyone could help me out with this, it would be great.

Thanks.

OK so with 6 full pods, and a full hopper, I can carry 1080 paintballs (excluding my GXG 2000round hauler), and my 20oz CO2 tank can roughly fire 1200 rounds before its empty.
To match the shot count exactly I would need a 72  4500 HPA tank. I also know that the weather can play a part in the capacity at which the tank holds. So I may not be getting exactly 1080 shots per fill. So I would need a slightly larger tank, and the only size up that I know of/can find locally is a 90 4500, which would give me roughly 100 more shots than my 20oz CO2 currently does now.

So for the next question, is there a HPA tank between 72 4500 and 90 4500?

Right now I have the CO2 on a remote, so I'd keep it the same for HPA. I am not concerned about running out of air during the day because I always buy the all day air/CO2 packages anyway. Im concerned about running out of air during a game. I play long rounds and often I will go through 1000rounds of paint in a single match (and during large events I even carry a smaller 12oz bottle as backup).

Thanks for the help and numbers to judge a tanks shot count. Looks like I am set to buy the 90 4500 (which is made by Ninja paintball).

oldpbnoob wrote: Coolant42 wrote: I play long rounds and often I will go through 1000rounds of paint in a single match Good lord.

Mack wrote: ^^^ I remember when I could play all day on two 10-round tubes.  Of course we had to mold our own paintballs back then.

Throwing rocks painted with berry juice at Mastadons doesnt count Mack.