MJR10,
I have had the good fortune of owning/shooting many makes and models of muzzleoaders and the ones that I don' t have a good friend of mine does. In my opinion you would be hard pressed to find a better muzzleloader than the Omega. In the future the Omega will be the muzzleloader others will be judged by.
You can find cheaper models and more expensive models, but when it comes right down to the nighty gritty the Omega is tops. The T/C Encore would be my 2nd choice, but it' s a little on the expensive side. My 3rd choice would be any of the Knight Disc Rifles.
I think you' ve already made the decision that you wanted an inline, by what you' re looking at. If not you should go to your local gun shop or find someone who can show you the different types of muzzleloaders. They are all fun.
And " yes" they are plenty accurate well beyond 150yds. in capable hands. It' s always good though to take a reading with a range finder before attempting any long range shots with a front stuffer.
Hope I helped you....and good luck with what ever front stuffer you choose. Keep us posted.
Keep it in the 10X