Sorry for not replying earlier been busy.
The 22 is what i run now and love it, and as mentioned to you Sunday(nice chatting) i use mine in the wet alot and its awsome, better than the SV was.
Yes its a little tight for electrics, but a spektrum micro revceiver and a normal ESC(speedo) will still fit in as i use these and a 1258 savox full size servo.
I would say you dont need to get the high priced Lipo's you mentioned, plenty of cheaper options that will perform perfectly.
I would say an 8.5 is a good start motor wise, I run a 7.5t in my 22.
Core RC charger great(i use one)
Come along and see the buggies in more detail. there were not many there sunday as it was the SC national. but club evenings will be better for a good nose.
As Dudders said, we all have our own preference's and we will all advise differently.
So you will have to go for what you like the look of etc really.
Feel free to have a close look at any of our stuff to give you a better idea, were all friendly as you saw Sunday.... well, mostt of us are LOL....
see you soon.
Darren