The Currado 300E (not the cheaper G!) is an amazing reel. I bought one this year and LOVE it! Ive hauled in everything with it including a few 20+LB springs. I have it spooled up with Pline CXX-Xtra strong mainline. Good line, as good as Maxima Ultragreen IMO, I just went with the Pline as it comes in 17LB and I could get a bit more on the reel.
The Calcutta B series is also AWESOME. I would buy that if you want more line capacity and and reel with a bit more weight. I was going to buy the 400B buy they dont make it in left hand!
Luckily the Currado comes in left so I got the 301E.
Ive never tried the Luna but Im sure its good. Guys Ive talked to about the Luna say its good but not as tought as the Calcutta or most Shimano reels and require more maintenance and $ to keep them working well.
Another good reel is the Abu Garcia Record. My girlfriend bought one this year and its been awesome. The same size as the 6500 reels but has a bigger crank handle and stronger drag. Just make sure to get the high capacity spool as the regular one does not hold much line.
Calcutta B, Currado E, or Abu record are my top picks in that price range for sure!
If your rod is the 10 foot 6 technium I would go for the Currado or the Record, if its the bigger 11 foot 6 I would go for the Calcutta as the extra weight would balance the rod better.