I have both the Lyman T-Mag and the Lee Classic. They're both plenty solid, and get the job done. I've had the T-mag for a couple of years, and just got the Lee this month. Had I gotten them in reverse order, I might never have gotten the Lyman. I tend to use the Lyman for rifle calibers, since it's sturdier but slower; and the Lee for pistol calibers I shoot a lot of. It's surprising how much faster the Lee is, due to the automatic powder feeder and the auto-indexing of the turret.
Also, the primer feeder on the Lyman simply does not work. I've long since given up on it, and use an RCBS hand primer which is faster, and more precise.
I've not made up my mind on the Lee Safety primer feed system. It works ten times better than the Lyman did, but it's certainly not perfect, especially with Winchester primers for some reason. In the end, I may go to batch sizing / priming cases 100 at a time even for use on the Lee.
Just my 2 cents,
Albert