The coolest in my opinion is the ARES DSR-1 (for its bullpup design) or the SOCOM Gear Barrett (you'll know why when you look at it) (another gun I really like is the Real Sword Dragunov SVD, but it is not as unique). For the most accurate and the most powerful you would take any sniper, put the tightest bore barrel you feel comfortable with in it, and beef up the internals. For an AEG like the Barrett you can put a stronger spring and reinforced gearbox parts. For a gas gun like the DSR-1, you can change the gas system to use CO2 (ARES makes a conversion kit for the DSR-1). Although both of these setups are very expensive, you can't expect the best to be cheap
Yes. You can get replacement springs for airsoft sniper rifles.
MP001, look at it on google or youtube, very reliable and stong, and accurate.
No.
Yes, an M14 Airsoft Sniper is good. My cousin has almost all of the airsoft guns their are and he loves the M14. I would recommend it.
UTG Shadow ops airsoft sniper rifle (L96 Type 96)
Yes of course
A paintball sniper rifle can shoot father.
It depends, dose your your sniper have threds? Type airsoft sniper silencer on Google and you will get something.
A paintball sniper rifle can shoot father.
The one you can afford.
Define "cheap"
No