Firstly, welcome to BladeForums - home of a bunch of nice knife-nuts!
I am biased - my knives-de-jour are Benchmades... this week. I like the 710 D2 you have - great EDC. I like my 760BK LTi even better never thought I'd say that about a Tanto blade - even a Bob Lum 'Americanized' variant - a bunch more bucks, of course. The older, and canned, 420 Resistor and 425 Gravitator I recently bought are quite nice. The 425 has the Wharncliffe straight edge, while it's 426 sibling is more traditional. Canned recently, the biggie 610 Rukus and it's normal sized 615 mini-Rukus are extremely useful. Check Benchmade's site - under 'Products', look for 'Classic Knives' - they are the canned ones.
Okay, maybe you need a change - the Kershaw 1725CB Junkyard Dog II with a composite blade and edged with CPM-D2 makes it a real user - with toothy G10 scales, too. If you shop at Wally World, they have the Kershaw OD1, Zing!, and Skyline for <$40 - bargains. While you are there, check out the $27 basic Buck 110 Folding Hunter - an American classic. If you really like it, consider a visit to Buck Knives site for their 'Custom Shop' - and have them build you a super custom made 110 - mine are keepers. Everything I've mentioned is US-made, too.
Let us know if you like fixed blades - we can help you spend even more moola!
Stainz