One important thing is whether it's for speedball or not.
But for non-speedball related paintball, I highly suggest a Tippmann98 Custom. Ive had mine for years, and while all my friends' guns break on them throughout a day of playing, mine never fails. It NEVER has. It is a very reliable gun, and it isn't too expensive.
For goggles, it is all personal oppinion, and what feels best to you. I personally think that JT makes the best goggles. Watever they are, make sure they have Thermal Lenses so they won't fog. You will soon find out that fog is the #1 enemy of paintball goggles.
If you want even more, get a new barrel. I bought a 14 incher for my 98 custom. It is amazing. Most importantly though, DO NOT get a barrel longer that 14 inches. Anything more will be a waste. Also, as a sidenote, if you get a 98 Custom, or some Tippmann, many will suggest the flatline barrel. Do not get it. My friend made the mistake of getting one, and it shoots far, but has to have a very high loop to it to get this high. It isn't very accurate.
Additional thoughts: I always tell people that Airsoft is better than paintball for multiple reasons, but in your case, it sounds like you shouldn't swtich since you are doing it with your co-workers. However, if you get bored of paintball, airsoft is always there. If you set a budget on this, remember to leave lots of extra cash for paintballs. Purchasing paintballs makes the sport very expensive.
No matter what you buy though, have fun, it's a great sport.