Yep, that's a good one, and a heck of a price...
Knight had the market until T/C came out with the Omega a few years back...Everyone bought in to the "easier to clean" marketing...It does take a little longer to clean but I still like a Knight....I own a Knight Disc myself....I'll try to be unbiased and give you the pros and cons...
1st...I think that's a Knight Disc Extreme...I actually like the straight comb on that gun better than on my Knight disc...It takes Knight's red disc...You install the 209 primer into the disc and then install the red primer into the breach and close the bolt...Some guys don't like this, I actually do, because the discs are easier to handle than just the 209s, and after the shot you simple open the bolt, remove the disc and install another for the next shot...I use my discs 2-3 times, just take a punch and punch out the primer....I guess Knight would prefer that I buy a new one for each shot, but I have done this for years...I bought 300 of the dsics for mine this spring at a local sporting goods store, they are 10 bucks for a 100...
A Knight has a Green Mountain barrel, they make some of the best...
A Knight comes with an adjustable trigger, the Omega doesn't...
A Knight has a safety, same position as on a Remington 700...The Omega has a hammer....
A Knight also has a screw safety...It restricts how far the bolt will move, preventing it from firing, until you back it off....I like this, because you can screw the safety in, pull the gun up in the tree with you and then screw the safety back to the fire position...Its nice and quiet, with and Omega you drop the trigger block, install the 209 and then push the trigger block back up, which makes a loud "click"...Some guys have complained that they missed a chance at a deer because they forgot to screw the safety back in, but I have never done this...Guess they just got excited...
As far as cleaning, you have to remover the breech plug from both rifles, with the Knight you also have to remove the bolt, takes maybe 1-2 minutes...You also need to disassemble the bolt and clean it, takes another 3-5 munutes....So it might take an additional 6-8 minutes to clean the Knight over the Omega....I'd rather have the adjustable trigger and the ease of installing and removing the 209 primer myself....
My favorite whitetail loads are ....Currently a 250 T/C Shockwave over 90 grains of Pyrodes R-S...Sighted in 2 1/2 inches high at 100 yards, I'm 2 1/2 low at 150...Groups are under a 1 1/2 inch at 100 and about 2-2 1/2 at 150...
Previous to using the Shockwave I used the Barnes 300 grain copper over 100 grains of Goex FF or 2 Pyrodex pellets....
Hope this helps, good luck...