Gyro, what to get???

I'm a very much newbie to the heli scene, and could use any suggestions you might have. I'm looking to get a better gyro for my Shuttle ZXX. Some choices I'm keeping my eye on are, Revolution PZ-200; Futaba GY501 AVCS; PG2000-II dual rate piezo; JR 550T; Thunder Tiger TG-8000; JR NEJ-120S; Futaba G301; JR NEJ-1000; Futaba GY240 head-holding; Airtronics SG-XBB. Are any of these ones to stay away from, or any a much better choice. I have a JR XP652 radio and a JR700 receiver. Since I know nothing about them yet, I'm hoping someone can help me out, Thanks

Ive tried quite a few gyros and know from experience that there are good ones as well as bad ones . Out of you list I can definatly recomend the gy501 this is by far the best gyro that i have tried to date and still have on my Moskito,others you mentioned that i think are good are the 460 and 550t by JR both are extremely good and easy to set up. CSM gyros are good if you get a good one regardless of which type but in a box of 10 you could probebly pick out 3 good ones. My own personal choise is the JR460 t of which I have five , hope this helps
Nigel

Thanks Nigel for the info. Want to get rid of one of yours, sounds like you have a bunch. Just kidding, you probably have a use for all of them. I might go for a JR since my radio and receiver are JR, but will keep in mind what you said. Thanks again

With all of the gyros that I mentioned and all that I didnt it is also very importent to get the maximum ability out of them by useing either a digital servo or a super servo.It realy annoys me when you go to a shop in the UK and they sell you a cheep gyro and cheep servo knowing full well that either youll be back for something better or even worse back for a crash kit, so take my advise get a decent gyro and servo and youll find that you can forget the tail is there untill you have to make a turn.
I realy wish that I could have known this when I first started it would have saved me a fortune,best of luck Nigel

Thanks again Nigel, would the NES 537 BB servo be good enough?

try the 8100g for 30 size heli or the 8700g for larger helis both are super servos Nigel

What do you think of the HiTech HS-925MG? I found a decent deal on one and was going to purchase, but thought Id ask you first. Thanks for all the input Nigel

servo looks good . good speed and good torque let me know how much you can get it for Imight get you to send me one.