Ok, great price point to start collecting at!
A few models spring to mind at the moment. The Spyderco Military is an exellent knife and of course has the SpyderHole! The Starmate is another excellent knife (my lock failure is highly unusual).
If you don't mind the thumb stud design, then there are a number of different knives also available.
The Microtech LCC in particular is a fantastic knife!
If you want a framelock in the price range you are looking at then the CRK&T S2 or the Benchmade 750 are available. Though be warned, the S2 is no longer made using premium ATS-34 and the 750 has been discontinued.
In an Axis lock the BT2 coated 710 in M2 tool steel is a great knife. Just be aware of the problems I have had with gunk getting in the lock!
I could go on and on and on... So here is a shortlist in no particular order.
Spyderco Military and Starmate (liner locks and CPM 440V)
Benchmade 710, 750 and 730 (Axis, Framelock and Axis steels inc 154CM/ATS-34 and M2)
Microtech LCC (liner lock and 154CM)
Al Mar Sere 2000 (liner lock and VG-10)
CRK&T S2 (Frame lock with either ATS-34 or Cutco-118 steel which is not as good)
Benchmade are bringing out a D2 tool steel AFCK Axis lock with a BT2 coating the 806. Now I don't care for the coating or the oval hole, but it is otherwise a very tempting knife. If it were not for the above I would order three! Oh, if I had the cash as well

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If I were to make a genuine recomondation I would ask a few things of you.
How important is rust resistance?
How important is edge holding?
How important is Toughness? (Will you be bashing the knife or cutting very hard things?)
What is your knife sharpening experience and what kit do you have?
From my biased point of view from what you have said so far, my N1 choice would be a CPM 440V Spyderco Military, with the 806 AFCK Axis a close second. I think either would be great knives. Then again the LCC is an amazing knife also, and so is...
The Military and 806 are hole openers, so I would look at those first, that is why I recomended them top.
I personally would go:
1.Chris Reeve Sebenza
2.Spyderco Military
3.Masters Of Defense CDQ DD
4.Microtech LCC D/A
5.BM 710 M2
But then thats me! I own all of the above and they are highly recommended.
