The following power systems will give you a great performing Flight Streak.
1) AXI 2814/12
2) For a full pattern 4000mah Li-Poly
For more performance/sport flying 2000-2200mah 20C Li-Poly
3) Castle Creations Phoenix-45 ESC
4) Graupner CAM or APC-E 8x5 (for more speed/sport flying) or 9x4 (for more thrust/less speed/aerobatics)
5) Z-Tron or JMP timer
Or you can use the Brodak ARF Super Clown power system for very similar results and a much lower price.
The brands listed were just suggestions. They can be substituted for an equivalent of any brand.