What action rod should I get for fishing with spinner baits?  

Thanks!

$0.02

MH power, Moderate or M-Fast action

fast or extra fast

x-fast.

I give.

The rod I'm using for spinner baits has dual purpose for me: it also serves as a deep crank(or bigger crankbait) rod. It's not a dedicated SB rod, and it's a MH/moderate rod.

As a dedicated SB rod a faster action is better.

I like MH fast or extra fast rods for SBs, but many manufacturers market M power rods for SBs and some even suggest fiberglass or composites, so I think this is one area that is truly personal preference.

M or MH fast

I use 3 different rods for three different spinnerbaits weights; MH 6.5' fast, MH 7.0' fast, H 7.0' fast.  I don't even own a medium action rod any longer.  I gave the last one away cause it felt like a wet noodle.

I use 3 different rods for three different spinnerbaits weights; MH 6.5' fast, MH 7.0' fast, H 7.0' fast. I don't even own a medium action rod any longer. I gave the last one away cause it felt like a wet noodle.

Ever fished a St. Croix medium power rod? My medium/fast St. Croix LE (EC66MF) has more backbone than my MH Loomis MBR783..granted it's only a GL3 and the graphite in the Croix is higher modulus, but the terms MH or M are misleading at times.

For accurate casts, I think a rod around 6' with a fast or ex-fast action is the ticket. For distance casting, a fast action rod in either 6'-6" or 7' fast action is better. I think you need both. BTW, Loomis spinnerbait specific rods are ex-fast action. I'm not a believer in moderate action rods for anything other than treble hook lures. If I used a moderate rod, I think I'd definately use braid to help with the hooksets. But, it all comes down to what works for you and what you like.

Medium heavy for sure.  Works for me.