I recommend the Benchmade BM942SBT designed by Warren Osborne. You can get it at www.1sks.com for about 130 or a smidge over that in all black. The ArcLock rocks and the scales are aircraft aluminum over a titanium liner. The modified Tanto oint should serve you well. Its my second favorite folder:
[url]http://www.1sks.com/store/benchmade-model-940-warren-osborne-axis-lock.html[/url]
I also recommend a Microtech socom fullsize over even the Benchmade (or anything else for that matter, but you aint gonna get that one for 130 bones, can find them for between 185 and 200 though. Toughest problem is its now out of production and very hard to find in all black. Its my Favorite folder:
[url]http://www.knifestuff.com/microtech/socom/socom_ma.htm[/url]
Gonna get flamed out the wazzu on this, but I have never PERSONALLY cared for Emerson. Very good and tough as nails, though, and I have friends in LE that SWEAR by them. You should be fine with any of the three brands you mentioned. Most importantly, go and hold each knife you consider, and get the one that feels best to you. Good Luck and stay safe!