I would say you'll enjoy the firestorm a lot. My wife has the E-firestorm flux rtr (well technically it's hers, though I drive it more
) and it is highly entertaining. My only complaint is that it is too light, so it's really hard to control on jumps, but I suspect the nitro firestorm won't have that problem since it has a metal chassis (the e-firestorm's is plastic). If you do go with the Firestorm though, see if you can change the battery setup to NiMH hump pack. I noticed on the HPI website that its comes with a AA receiver battery setup. Likely all you'd need to do is buy the appropriate switch to hook up to a hump pack. AA's are useless as a receiver battery.
Let us know what you get!