Cold press generally is what i prefer for watercolour, but when inking it'd best to get the smoothest paper you can find.. different brands differ as well... so don't feel it's enitrely a price or "type" thing... I doubt you'd be able to paint without buckling without streching it, unless it's prestretched, or a heavy enough (300+) paper that it just can't buckle due to the strength of the thickness... if you don't like buckling, the only 100% fix is stretching its just annoying to set up.. i hate the glue tape, any i've yet to work out an easier way to do it up...
That sounds like a much better paper overall anyways... we found that the cheaper stuff either never actually goes into the paper, usually when there's not enough rag in the mix... or it'll soak in almost instantly, without getting the correct mixing effect...
As for longer drying times.. thats always true.. watercolour is pretty much never a one sitting per painting experience... you do layer upon layer and wait for it to dry.. fanning can be a bad thing and get "backruns" were if you add new water to a slightly damp part of the paper you'll get odd blossoms.. something you can use for texture.. but most of the time its an unwanted effect... thats why its generally best to do sections of the painting that do not touch, then letting them dry before doing anything even remotely adjacent... thats why a hairdryer also helps...