Though I grew up using spinning reels, I've made a pretty solid conversion to level-wind setups.  They just seem better for jigging deep and trolling and so on, which are things I'm doing more these days.  My current favorite is a Shimano Tekota with a line counter.

Still, for shore casting and such, a spinning reel is nice to have.  Last year I had a good solid Shimano reel and one spool for mono, one for braid, but I gave it away to some Mexicans who helped me out of a seriously mud-mired truck.  Damned if I can remember the type, but as far as I can tell Shimano no longer makes it.

And now, I'm flat-out amazed at how hard it is to find a decent, fairly heavy-duty spinning reel with a spare spool.  I have searched and shopped online a couple times, and I just get worn out after 20 minutes of that and give up!  Does anyone have a recommendation?  I'd really love two spools, on a rig appropriate for heavier lines like 20 pound mono and braid for saltwater use.