Nice to hear that you put time into your kids. Dont get that much nowdays.
Anyway, its still a difficult decision to make on which buggy to choose from seems how we cannt see in what condition they are. O.K you said the LX is in kit form, is that a new kit???
The hyper needs parts because of wear. Now comes the question of whether or not you are willing to put the time in the buggy to get it running well but from what I have read so fare and can gather about you, your willing to put in a bit of time for your kids plesure, good on you mate.Now try to figure out how much do you have to spend on the hyper to get it rolling.
End effect they are still both relativly good buggies. Flip a coin. (Hope it lands on the Hyper side though)