it's perfectly alright to use gtk+ for the gui, but...
stay away from gtkmm, use pure gtk+ as much as you can
also,
consider hanging out at the #lv2 channel on irc.freenode.net; drobilla (aka. Dave Robillard) is the guru in charge of most if not all things related inside out of lv2 :)
in short
also,
consider hanging out at the #lv2 channel on irc.freenode.net; drobilla (aka. Dave Robillard) is the guru in charge of most if not all things related inside out of lv2 :)
merry x-mas
cheers