Pics would help some, chances are trd/nf210 springs will bring you down and give you a decent ride, but wont completely eliminate your gaps... They are conservative as far as a drop, but will look good, and feel decent (trds are a little stiff)
Df210s and the tien s-tech springs will bring you down a good bit more, and both are sposed to be pretty soft, so they will ride fairly well on decent roads, but you will have less shock travel. (and will likely tuck your tires in the rear slightly)
A general rule of thumb is the further you drop, the less spring and shock travel you will have, and the less spring and shock travel you have the rougher your ride will be.
but its something you get used to unless you have a bad back or it really just messes with you. Ive been running on coilovers slammed to the dirt for a couple months now and you get used to the ride being not so awesome.
I actually like it.