Buying new guns - us here at the Okto office still get that Christmas morning feeling waiting for the courier.
Its really easy to get seduced by all the models available. Look a lot, spend nothing, until you understand what it is you want to play.
The first rifle i bought was an L96 bolt action spring sniper rifle - big mistake - seduced you see.
Play some games with rental kit and get some game time. There are lots of sub-games in airsoft - decide what you like best; CQB, woodland, milsim, run and gunning, support gunning, sniping.
Get it clear in your own head what you need and then look for a suitable rifle - pick the right type of weapon first i.e. use your head, make a shortlist and then pick what you want based on your heart.