a5
the a5 was my first gun, had it for nearly 4 years and never had any major problums with it. its reliable, tough and does the job nicely
some would say the ak47 of paintball.
however... if you are only interested in playing in the woods, (as i was when i started out) then it is a great option. you may find yourself drawn toward the tournament scene however (youtube "paintball" and you will see what i mean) i think i can safely say that we all started in the woods, then slowly got drawn into tournament or "sup air ball".
here the a5 is useless, as it is heavy, big, and has a huge block called a cyclone sticking out of the side
if you are sure your going for the milsim look, go for the a5 or the x7, however in my experiance iv found that pracicallity beats looks any day. for this you want a light accurate marker, that can put paint down when you need to and can be used for tournament paintball if you decide to go down that route.
as for getting a package, dont bother. the most important piece of kit is your mask, get a decent one like dye invision/i3/pro i3, empire, jt proflex, vforce grillz or suchlike. make sure you get one with a thermal lense. packages NEVER come with decent masks, or decent anything for that matter.
accuracy is down to you as bigjim said, but you will want an upgrade barrel. dont go for one more than 16in they just get in the way and waste loads of air trying to get the paintball down the barrel. snipers in paintball dont really exist as all guns fire the same distance.
hope this helps, any questions give me a shout