Ihave been using Hyperion 5350mah packs which have been great but they do struggle in the wind. Ihave been researching some replacements and it seems that the packs out of HK are well regarded for the price (albeit that you do get some duds). There seemsto be be three brands with packs as follows (aswell as the new Hyperion product for reference):
Zippy-H 5000mah 20-30c $105 659gm 160x51x40
Flightmax 5000mah 20-30c $69 632gm 145x50x41
Flightmax 5000mah 25-35c $82 628gm 145x50x40
Flightmax 5000mah 30-40c $94 650gm 145x48x40
Rhino 4900mah 20-30c $70 625gm 184x51x41
Hyperion G3 5000mah 25-45c $161 618gm 141x46x53

Here is a link www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=8589&Product_Name=ZI PPY_Flightmax_5000mAh_5S1P_30C to the second option for reference.

So, I have seem some great comments about the Zippy-H and newer comments on the Rhino. Iam interested int he Flightmax packs and am curious if anyone has tried them and if someone can explain the difference between the different C rated packs (looks like they have the same cells but are rated differently).

All the best, Simon