Yeah, I'm aware of that. I'm not looking at this moment, but I would like to get one eventually. I love M14, sr25, and L96. But the L96 springer's kinda suck. So I would stick with getting an M14, or SR25. Love those ones. So, maybe a CA sr25, or something. Idk. But I would like to get a sniper shooting atleast 500fps
MOST, but not all large event organizers do not allow AEG's are sniper rifles. In MOST cases, sniper rifles are bolt action gas/spring powered. I would recommend the Tanaka M40A1. Shoots around 560 to 570 fps with a .20 gram bb. If that is too rich for your blood, you might want to look at a KJW M700 which shoots about 540 to 550 fps. Either gas gun would do you great with very minimal upgrading.
If you want to go spring, I would go for a VSR-10 type. I would recommend TM over all other brands if you have the money, but if you do not, then maybe a JG BAR-10 as a cheaper avenue to start. Just know that the VSR-10 variants do shoot low fps stock, but there are a lot of aftermarket parts to upgrade them...on a side note to that, the parts are not cheap to get this gun shooting 500 fps plus reliably.
Now, if you plan on never attending a large type of game and your local event organizers allow electric sniper rifles, I would recommend a TM M14 or the like (CA or G&G). CA SR25 are ok, but with its extended version 2 mechbox, there are some issues of compression which will take away from accuracy. M14's in its airsoft forms have a good design much better than the version 2 mechbox design.