Thank you for your reply
I respect your knowledge and your proposals and I read about LiPo predominance over NiMh cells and I feel the same, (Suicideneil your links are fantastic and your level of knowledge is far beyond), but I am novice in RC world and I am afraid to use something else except from these, which Traxxas recommends. I have to point out the lack of technical support of the retailers in my country (Greece), that enforce me not to depend on them.
What about the budget? Ok those T5000.2S.15 - Turnigy 5000mAh 2S 15C LiPos are a great deal, what about chargers? LVC?
…and what about complexity? …are that waterproof? (This is the main reason to purchase E-Maxx)

NiMh its near 80€ (2packs of NiMh 4200mAh 8.4V with TRX connector and a AC twin output charger) …that’s it
http://www.promatchracing.com/proddetail.php?prod=42007
(Product ID: 42007 - ENER-G 4200 7 CELL FLAT STICK PACK)
http://www.modelsport.co.uk/?CallFun...n&ItemID=32524
(Fusion 5ive Delta Peak Dual Output Charger)

I was thinking having NiMh for a year or so and go LiPo or A123 afterwards
So I thing I’ll stay with NiMh simplicity at the moment
…could you please advise me about NiMh products I found or others that I haven’t found out about?
Thanks