The 2.5-10 IOR is a fine scope for the money. I have one (SFP) and will likely pick up another (FFP) fairly soon. About the only bad thing I can say is the eye relief is fairly short. I don't have any problems on my light, unbraked 300 RUM with it mounted in the right spot though.
How do you plan on using it? Conquests are nice too but different. Depending upon the model you were looking for you'll likely find a Conquest to have more eye relief, be lighter and some of their reticles may be better for low light. The IOR is built a little more heavy-duty style, has a ton of internal adjustment, very repeatable tracking and the outstanding MP-8 Reticle.