Last year I bought both of my boys, now 11 and 15, each their own Stampede. Basic 2wd models, NiMH battery with extra 5000mAH NiMH batteries and fast chargers. After much pressure from the boys (and replacing of many broken parts) they have talked me into buying my own RC car. Wanting something on-par but different just for the sake of being different I'm leaning heavily towards the Slash. I'm also thinking I should go with the no batteries included model and buy a LiPO battery or two and LiPO charger. I'm not worried about speed, at least for now, just looking for longer run times. Logically it would seem to me that a 5000mAH battery is a 5000mAH battery, and whether it's NiMH or LiPO wouldn't change the run time, but what I've read seems to say the opposite.
If it helps, typical use will be a mix of street, grass, and occasional dirt RC playground. If I need to I'll switch to larger Stampede sized tires, but for now I'm not looking for a list of upgrades. I'll replace parts with upgrades when I break them. The only racing I'll be doing is against my kids. I'm also looking to keep the costs down so I'll be sticking to the base model Slash/Stampede price range plus LiPO batteries (assuming they are worth the extra cost).
Other than what I've read over the weekend, I'm clueless about RC cars. Heck, a few days ago I didn't know what basher/bashing meant. I don't know what I don't know... Does what I wrote above sound reasonable? Words of advice, suggestions or alternatives I should consider?