I have a cyclops mag, and it's been fine for me.

If I were buying a trainer now, though - this is what I'd buy: http://www.kurtkinetic.com/trainers-c-7-l-en.html (The Road Machine). From what I hear, you can't beat the road feel of it. From my (limited) understanding, a trainer will let you build strength while rollers work on endurance/your spin/balance.

Good luck!

CA