String's Strings the wonderful things,

It's time to change the strings on my guitar. I seemed to of snaped the cheap slinky... *shrugs* Oh well such is life. So here's the question

I'm looking for good strings, I like a really heavy gauge low end, but a light for the high, "I like bright trebles and warm lows" but I can't seem to find a good set of strings that I will buy again. I've gone though many type's and as for now DR's are the best i've used, but the low wasn't heavy enough, sounded to bright for my liking.

Any suggestions?

Also what is the diffrence between flat wound, round wound, hex core, and cyrogenicly frozen strings? and long life coatings? so many things said to improve tone and life... are they true?