So why not a TEC140? I love mine and it is pretty close to perfect on the Paramount MX mount.
Most every APO is going to need a field flattener if you want to use a camera able to capture a wide field. The TEC Flattener alone adds $750.00. Yuri said with a KAF8300 CCD camera (which is a pretty nice match for the scope giving 1.14 Arc sec resolution) that I probably wouldn't need a flattener. Mostly true, but I do see some distortion right at the edges which I can easily crop off. My photos look pretty flat but surprisingly, even so, CCDInspector shows curvature. Anything larger than the KAF8300 and the FF isn't optional. I'm pretty sure this is standard fare for just about any APO. The WO scope you listed in the first post is fast and has a FF but it is way higher than your budget. Anyway, I could wax on about the TEC for a long time, but most would probably agree that it ranks amongst the top 2 or 3 refractors currently in production, and compared to those other 1 or 2 top scopes comes in more affordable, perhaps because it uses an oil spaced triplet, rather than air spaced. People will argue the merits/demerits of this design forever, but one thing that seems to stand out in my reading is that these lenses are quicker to reach thermal equilibrium. Another thing you might consider is that these top end scopes retain their resale value extremely well. If you want to sell a TEC, and you price it fairly, you might sell it in a day.
Visually my TEC140 has given me the greatest views of the planets/moon I can quite imagine. Sure, I'd love a TEC180 or TEC200, but this size seems to hit a sweet spot in terms of seeing with larger apertures more affected by poor seeing. Not that 10 mm is going to make a huge difference one way or the other. I didn't price your other scopes re required accessories, but you can see the TEC140 prices here. It's fairly close to your budget new, but you need to factor in shipping and customs too. On the used market they certainly do come up and you could get the whole package under your $7k.
http://www.telescopengineering.com/t...der/order.html