Both are very different styles of play.
Before I can make a recommendation, I have to ask a few questions.
What's your current marker and play style? i.e. Do you hang out in the back laying down lots of cover fire? or Do you get as far up as possible, get into some tight bunkers?
Have you considered starting with a single pistol? and if so why not?
Do you plan to use First Strikes primarily? At all?
(Does your field allow first strikes?)
How many extra magazines had you planned on buying?
Along with 9.1 or dual 8.1s... make a plan on how you are going to carry your gear and extra mags. I've spent almost as much on pouches, vests, belts, and holsters as I did on the markers to make it "perfect".
Personally, my primary is a dual pistol 9.1 and 8.1, setup using only first strikes. Flasc barrels and "mock"
suppressors. Both with small red dot sights to make the most out of the first strikes. (Fixxer's Top Tac Rail on the 8.1 enabled use of a sight.)
My alternate/backup/last-year's setup was polished dual 8s using only paintballs.
Not knowing anything more ... my personal recommendation for someone starting out with Tiberius.
Start with a single *new* 8.1 from a local shop. That way if there's any out of the box trouble you have a spot to go back to for assistance.
Based on lots of cash and experience spent on trial and error. Get the following for your "starter kit":
- Full Clip Belt/MOLLE Holster (Lefty available) - http://www.ansgear.com/ProductDetail...RMOLL ERBLACK
The holster is a low cost addition to your gear that will make pistol use a dream between games. The Full Clip has a clean draw, it's light weight, and flexible so as not to get in your way. The belt version is simpler, cheaper, lighter, and IMHO more versatile then the drop-leg. Try it first. If you "must have" a drop leg later, you can add a MOLLE drop leg panel and place the existing holster on it.
- 3 Additional Mags - http://www.ansgear.com/ProductDetail...MSFSMAGAZ INE
I'd recommend 3 additional mags for a total of 4. If you needed to cut back, then get an additional 2 mags for 3 total... just know that if/when you have a mag issue you'll be down to only 2 mags till you fix the issue.
- 2 Double Full Clip Mag holders. http://www.ansgear.com/ProductDetail...BDO UBLEBLACK
This gives you 4 mag pouches for your belt or MOLLE vest. You may think "I only need 3 for the 3 extra mags". It's nice to have an open mag slot to dump the empty into. You don't want to loose the pricey mags.
- Case of First Strikes - http://www.ansgear.com/ProductDetail...00CO UNTWHITE
First strikes fly differently then a typical paintball. You'll want to practice some in a "back yard" if possible. Or if you are lucky enough to have a Bring Your Own Paint field ... buying them by the 100 round case is the best way to go.
The above type of setup should run you around $400 total. It forgoes an expensive MOLLE vest/rig by using pouches and holsters that can work on a standard belt. If later you decide to pickup a MOLLE vest/rig, the existing holster and pouches will work.
This is by no means meant as:
"I AM PISTOL GOD, DO AS I SAY EXACTLY OR SUFFER THE WRATH OF GETTING CALLED A nOOb".
Quite the opposite. This is just what I would start with if I had to do it over again from zero. ... Then add magazines, pouches, vest and maybe a 9.1 down the line.
If you are not
going to use first strikes at all... and decide to go the pistol only
route. Give a serious look to the TPX. It has matured into a nice pistol, past the initial problems. If you want lots and lots of magazines, the cost per mag does helps lower the total cost and weight
considerably. (But you also need to find a way to add extra 12 grams to your rig).