I've not owned any of the cars on your list but I am in the same position re: coming back, I had a good look around at the various 2wd cars with a strong pull towards the Losi 22 as I'd ran a Losi 2wd from the XX and XXX BK2 etc, until the 22 arrived as I'd left racing by then. I had a good look at the H2 Pro but lack of knowledge with a new release put me off a little plus on the tart side all the different anodized colours hurt my eyes
B4.2 looks well built/designed but not my thing as I've never got on with AE cars.
Bmax2 again is very new but past experience with Yokomo and needing to replace half the car to get it working has me looking elsewhere.
I ended up with a Cougar SV2 and so far I'm impressed, seems a strong car and responds well to changes. The fit of parts is good, more space than some for electrics, option to run shorty or saddles, and easy to obtain parts.