ATM Finished Primary Mirror

I am in the planning stage of building my first telescope (I already own a mass-produced scope). I am not yet confident, nor can I afford the time, patience and equipment to make my own primary mirror and, as a consequence, I have been surfing the net and found that the mirrors from Discovery, Orion, University Optics and Parks Optical are within my intended budget for the project. The mirror from Price optical is from $75-$100 more than the mirrors of the other competitors and I am willing to spend the additional sum if it results in relatively superior mirror. I have found no information on the quality of the Parks Optical mirror; only its price.

I am s sixty-five year old retired professor and I am really enthusiastic about ATM (but not blinded by my enthusiasm to attempt to make my own mirror - give me time).