I think that the 705 would be a logical choice to go with the 710, assuming you like the 710.
I don't have a 705, but do have the mini-AFCK and the 940. Both are excellent. They are about the same size and thickness. The 940 is a much nicer looking knife, and has the Axis lock in it's favor+it's ambidextrous.
On the other hand the mini-AFCK's G-10 scales don't show wear or scratch up like the anodized 940. Though it is a liner lock, lockup is very good on mine (as a matter of fact, my mini and full-size AFCK's have less blade play than my 940-when it's pivot screw is loosened enough to allow effortless "flicking"). IMO, it's slightly recurved blade outcuts the relatively straight blade of the 940, and it is less expensive.
Both of them fit my medium sized hands very well.
For everyday use the 940 is a much slicker package, but I would choose the mini-AFCK in M2 if I were a "heavy" user. My .02.
Spydercos are also excellent, IMO, but I really like Benchmade's designs alot more.
Good luck choosing between all these great knives