The TM VSR-10 is also an amazing upgrade platform
The hop-up unit is fantastic out of the box.
For my first year of sniping I left my TM VSR-10 bone stock, this made me get use to being sneaky enough to get close so I can make be sure that I can make the shot.
Recently I'm turned away from bolt action sniping and gone to AEG "marksman-ing" The field that I normally play it isn't very good for snipers (basically CQB distances in thick bush) so the AEG suites that place well