I have the 735 and am very happy with it. Found it on Craigslist for 400, like new in the box, with in and out tables and an extra set of unused knives plus four which had been used but not sharpened. Ran many thousands of board feet through it. I sharpen the knives on my Tormek and they last a decent amount of time. If a knife gets a nick I keep using it for rough planning. Then when I want a better surface, a finished smooth surface, I just flip one of the knives. That eliminates the chip area of the knives lining up so what one misses the other cleans up. Seems obvious but most people just replace both chipped knives. Extra work and then you have two knives to sharpen or worse four with the next nick.
I do use a dust collector off the back end. I have a old Jet DC that was sitting around after it was replace by a mustard yellow one so I hooked it up. You do have to empty the bag frequently but the chip and dust all being caught at the source makes it worth the effort. I use the stuff for mulch around flowers and trees.
If you put yours on a mobile base make sure it is fairly solid. The planer is a lot of weight. I love moving mine outside in nice weather. Hook up the dust collector and go. All rough planning is done on the fast in-feed speed. I only use the slow in-feed speed for finish work. Adjustments are very good and knife changing is a snap.