Find a deal on something that is cool to start with then put a little extra into making it your own, just find a good gunsmith that will work with you. I can recommend a couple -
My Georgia Detonics CombatMaster <$1050 total invested
Before
After
My S&W 586 L-Comp <$800 total invested
Beore
After
Custom 9mm S&W 360J around $1100 total invested
Before (.38spl +P)
After
Or do a little hunting and you can find some relatively rare and cool stuff that the guy in the next booth at the range won't have. I got each of these for well under $1000 -
Unfired AMT AutoMag V .50AE
Unfired original Coonan Model B .357mag
Unfired AMT Hardballer Longslide (Arcadia factory)
Universal Enforcer .30 Carbine pistol
Vintage chopped S&W 1917/1937 Brazilian .45acp
Austin Behlert custom S&W 25-2 .45acp
So, IMO, go for unique if you don't want some run of the mill gun that everybody and their cousin has. Either customize something and make it your own or do a little looking around and you can find all kinds of neat iron looking for a new home!