I don't know if I'm really "pro-mage," and I don't think I'm "anti-templar." I'm definitely against the Chantry, which I think has predictably become a perversion of Andraste's philosophy over the past thousand years.
For me, personally, the idea of a circle of magi is not inherently bad. For one of my "main" characters to get behind the idea, however, several things would need to change from the current model (as we've seen it.) First, it would need to be optional. If a mage chose to leave the circle and live as a hedge mage, there would be no Templar hunters, no phylacteries, no threat of capture or death. The circle would provide organisation, safety, security, and comfort. Enchanting income and donations from wealthy patrons could support a standard of living much higher than most hedge mages could achieve.
Secondly, the Templar order would exist to defend the mages, not to control them. Defending mages would include killing dangerous abominations, and enforcing the code of conduct mages would need to agree to in order to live in the Circle. Using prohibited techniques like mind control would be grounds for the Templars to arrest the errant Circle mage, return him or her to the Circle tower for trial, and potentially carry out the sentence imposed by the court of enchanters.
Third, the Circle would need to be secular, not an arm of the Chantry. If an elf wants to join the Circle, it shouldn't be necessary to abandon veneration of (what's left of) the elvhen pantheon of gods. If a mage wants to venerate the flying spaghetti monster, so be it. The Circle shouldn't be governed in accordance with Chantry dogma, subject to Chantry edict, or related financially to the Chantry. The same goes for the Templars, they should be supported by the Circle and completely Chantry-independant.
I think that the Circle towers should be individual grants from the crown, and the grant should be contingent upon circle mages swearing never to seek to rule any land beyond that granted (which might include a village and some farmland in addition to the tower itself.) The tower should swear to defend the kingdom, as the king promises to defend the tower.
I think there is a (very) remote chance that something like this might come to pass in Ferelden, and if it does my characters will support it (except for the contrarian ones, obviously.) I think there is a snowball's chance in hell of anything remotely like this happening in Orlais, though, so I find myself tending to gravitate more towards supporting thrashing the entire Circle system there, which seems to be what's happened. So, viva la revolution!