which would you choose?  all around application - going on a legend elite 7' MF casting rod.

I can only comment on the Revo. It's a very good reel that I would recommend to anybody.

Falcon

x2 for stx

I'd go 50MG if it were my money but to be fully honest, I've never held a zillion...   I'd buy the MG anyway though, because I love light weight reels... especially on a M rod.

I have a Zillion on a Med. Custom built Legend Elite.

The Zillion is a bit big for it.  My curado 100DSV works much better with it.  So in that respect, I would chose the 50 MG for sure for a Med. Legend Elite.

I am building a Loomis IMX MED HEAVY for the Zillion.

No experience with STX, but I hear their drag is top notch for reel that size (24lbs of pressure).... You probably won't tap that range though if you using a med stick.

Neways, 50 MG for sure...  Zillion is awesome if you have a heavier rod.  Also the 50 can cast lighter lures a lot better than the zillion.

I want a 50 mg now.... >

i'd go with the Shimano....I have a Chronarch and an STX,  I also have a couple Quantum Energy's....The Shimano is so much smoother and casts much nicer than all of them.

I have a Zillion 100SHLA and a Chronarch 51 Mg and they are both great! I have my Zillion on a Heavy/X -Fast rod (Crucial) and the Chronarch on a Medium/Fast rod (Avid). I think the Chronarch Mg/Legend Elite would make an awesome combo.

Good luck!

I fished a STX breifly that belonged to someone else, so I didn't really get to test it thoroughly. It's a nice reel, but I would like to fish it longer before making a recommendation. I have fished with the 50Mg hundreds of hours in all conditions. I have 4 of them and will probably get more. I love them and heartily recommend it. I have no experience with the zillion.

Ronnie

i would have to agree with the majority here too and say the 50 mg.  the other 2 are great reels but seem to be a little much on the MF stick.  you won't be able to benefit from the super drag of the STX and the zillion seems a bit big and heavy for a medium stick and the baits you throw with one.....50 mg and 10-12# line on that rod will be one sweet combo.

The 50MG & a Texas Rig; the sweetest setup you'll ever use  

I can give a solid opinion on the Zillion.  

I've said it before, IMHO, the Zillion is the best workhorse reel out there.

STX

comparing the stx to the zillion, i prefer the zillion. I love them both but something about the zillion just feels a little better in my hand

Jigs and worms...Mg50

Spinnerbaits, Crankbaits, and Rip baits....Zillion