Maybe your top mounts knocking common issue, whne mine was being serviced i mentoned the clunking sound coming from the n/s got told the droplinks were nearly new and it wasn't anything serious.
Pair of group n tops will set you back about 85quid each off the bay. (Another thing on my list)
I'd google a tinting firm. There's a place nearme that will do 4 windows for 100quid. (No good to us with five) i echo jay's comments the kits you get are pants and you'll always end up with at least one bubble you can't remove which will annoy you forever.
Will set the car off and look good (i am biased though) plus keep the interior a bit cooler im the summer :-)