25C isn't really enough - but C ratings are linked to capacity as well (a 20C 6000mAh pack can provide the same punch as a 40C 3000mAh pack) so the numbers themselves are meaningless.
You really want 5000mAh and 50C or more. It need not be expensive though - Turnigy Nanotechs are fine for club use and can be sourced from Hobbykings UK warehouse.
The Core charger is perfectly good. Its a popular model so if you've heard more about them breaking than others its just cos there are more out there. Its certainly no worse.
For a 2wd any 8.5t motor should provide plenty of performance for our track. Different people recommend different types but its more down to how they drive and personal preference really. I use 10.5t's myself and I've got motors from Nosram, Speed Passion, Team Wave, Novak, GM and Team Orion. They all drive differently, but with appropriate gearing all offer pretty much the same performance really.
A good ESC is certainly worth investing in - but it doesn't need to cost a fortune. A Speed Passion ESC at £85 does all you'll need for a 2wd at least.
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Yz4 - Yz2
DEX210 - Cobra 4210- DEX410
RC10 Team - Manta Ray - RC10T
Mini Trophy - Blizzard - Wheely King
Tz4 - GT24B
BMRCC
Emergency back-up race controller
(but only if nobody better is available)
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