I've been eyeballing a 4 wood for awhile now and just haven't been able to pull the trigger on buying it. It would probably be a good idea to have something else to hit off the tee that can still get 240ish max distance for shorter 4s and possibly a tee and 2nd shot on par 5s.
It has been my go two on most par 5 for my second shot. It is the TM burner 2.0. Nice and light and never felt a wood make contact like it does, though my experience is limited.
I was going to get a 5W to compliment my 3W, but I am no consistent enough to see a difference. My 3W might go 200-240. a 5W might go 200-225. So I figured hell I'll grab a 4W and turn it into a 220-240 club. It has been very consistent and looks good in the bag (my 3H and driver are also burner 2.0).