No experience with thunderpower, but i did own the orion 90c pack. i really saw zero difference between the orion 90c and other cheap packs that were rated at 45 and 50c. however when i went to the 65x65 from trinity i saw a huge difference in punch, went to a reedy 65x65 and it was equal to the trinity pack still much better that the orion.
best pack i have owned yet is hands down the speed zone 7200 80c . check out their warranty, 100 times better than dealing with trinity,and Gavins customer service has been spectacular !
The Hobby Shop,The Ohio RC Factory
T.O.P. Photon CRC XTI, XRAY T4 15 xray xb4 xb8e losi sct 2.0
insanity takes it's toll...please have exact change