First purchases!

On that note I picked up a used x7 phenom (stock) off the classifieds and am wondering what to get next.  What do you guys think:

I always recommend that players use/test their marker stock before spending any money on upgrades so they don't end up buying stuff that eventually gets taken off of the marker and stuck in a drawer somewhere.

- Scope/flashlight/laser/dot: having limited functionality I don't plan on getting any of this stuff until we commit to hardcore milsim or I want to do some fun modding.

• Scopes are essentially useless for aiming because of the arcing trajectory that paintballs take enroute to the target. 
  
• They can be useful for spotting however if the terrain allows.
  
• Flashlights can be useful for clearing buildings or night play
• The beam can be noted by opponents from much farther away than it can illuminate opponents.
  
•  Lasers are pretty much useless outside in daylight but can be fun inside or during lower light conditions.
• Remember the laser can give your position away.
• Be aware they aren't allowed at many commercial fields because of the danger of eye damage from shining them in someones face.
• If by dot sight you mean one of the various types of red dot sights opinions differ.
• I consider them useful for making sure one's first shot is on target during ambushes, others see know purpose for them at all and prefer to just open fire and aim by watching where the balls go.
  

- Co2 vsHPA: Although I'd like to go HPA I think we're all going to go CO2 and just get some big tanks to share from.  Because there is no refill site within hours and we're out playing in the boonies then I figured this was best.

• CO2 is probably your best choice based upon the description of where you will be playing. 
  
• In warmer weather it gives you more shots from a comparatively sized tank than compressed air will.
• However, CO2 is temperature sensitive and is not the best choice if you are considering winter play.
• I wouldn't recommend it for anything much below 55*; but I'm not a fan of cold weather games either.
  
• If you do go with CO2, you will need several additional items:
• The equipment required to fill smaller tanks from the big tank.
• A small scale for weighing the smaller tanks before and during filling to avoid overfilling.
• A larger scale to weigh the big tank so you will know how much is left in it.
• It is also important to know what you're doing when filling the smaller tanks as improper filling can have potentially disastrous results.
• What I would actually recommend is that each player purchase at least two 20 ounce tanks and make sure both are full before each outing.
• This should be more than sufficient for a day of play.
• Or, if 20 ounce tanks are too heavy/throw off the weight of the marker, then multiple tanks of smaller sizes could be used. 
  
• I don't recommend using anything smaller than a 12 ounce tank because the smaller tanks are more prone to overheating and blowing burst disks on hot days.
• With this in mind, always store the spare tanks someplace out of direct sunlight/cool while at the field.
• I used to keep mine in a cooler in the shade.
• It's also a good idea to have spare burst disks and spare tank o-rings handy.
• Actually, out in the boonies, everyone should have a tool kit with spare parts, oil, rags, water for cleaning up masks and gear, etc.