With different gauge strings intonation will need re-adjustment. This might be too much of a head-ache for an acoustic guitar. Either let a good guitar tech do it for you -- or -- better -- go back to the same gauge strings that you used to have before.
Also, I suppose, different strings (like all gear in general) are made for different purposes. About a couple months ago I put nice Martin strings on my inexpensive Yamaha acoustic. I had to strum real hard with those Martin strings to sound really nice -- but the guitar started making little buzzes here and there (mostly in the bridge area), so eventually I decided to go back to Yamaha brand strings.

Bottom line is I suggest that you make sure that you really want those new strings on your guitar, then take it to a tech, or go back to the gauge strings you had originally on your guitar.

Happy strumming!