I'll break it up in 2 groups, new & second hand, all $2500 or less.
NEW:
1. Whites TDI S/L
2. Whites SPP
3. Eureka Gold
4. Whites GMT
5. Fisher Gold Bug 2 (mild ground) or Whites MXT (medium ground)
Haven't used a Fors Gold but that could potentially be in the above list.
USED:
1. GP 3500
2. GP 3000/extreme (usually same price)
3. SD2200 D or V2
4. SD2100 v2 or e
5. Whatever you can find/is on the market from the top list, and throw in an XT18000, Goldmaster VSat or 3 or 4B, Tesoro Lobo or Diablo or Dingo