Always liked the low wide stance of the soviet MT-LB and think the M-113 would look cool if it were longer and lower too. That said there is the question of internal volume and existing infrastructure, i.e. lower without an increase in width or length means less volume, but wider, in particular means logistic support and transport struggles.
Then again the were the Israeli Zeldas with spaced armour and the flotation kits on AICV, ARV and MRV versions that look pretty cool as they are wider for the given hull height.