you can upgrade some things that you can later on transfer. Like a barrel, Hopper, Reg. It basically up to you tho. I was faced with the same choice when I had my Victor 2. I chose to upgrade to The One.
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Dragun "The One"
Black/Green Fade
Dye Excel Barrel 14"
Halo B w/ Rip Drive
1337 Remote Control Setup (Limited Time only).....
oh, i forgot to mention. definitely buy a nitro tank now. that way you can use it till you get your next gun, and you'll most certainly want one with a better gun.