i can say that 2WD buggy will make you a better driver. i raced Stadium truck nitro, 1/8 nitro buggy, and 1/18th stadium truck back in the day. and i havent driven in 5 years or so. but within the first 3 days of practicing with my B4 i am much more consistant than i ever was. it will make you focus more on every aspect. a 1/8th buggy can be corrected in mid-air with ALOT more control than a 2WD 1/10th. you also have to be alot more careful when exiting turns as well as pick your lines with more "finesse" to be fast.
the B4 is also a reliable car with tons of settup info. i would call it a great beginners car.
Matt