I was in the same boat (actually, Blur 4X vs Heckler). As 006_007 mentioned, this is a common battle. It is also discussed at length in the Santa Cruz Forum. The guys there are really helpful and should point you in the right direction in terms of the type of riding you do and what you expect out of the bike.
Quick points:
Heckler - Santa Cruz's best selling bike (according to a Santa Cruz rep). Can be built up for freeride or lightened for XC. I know a guy who races his Heckler in XC races expert class, and actually won a few. Simple, less hassle single-pivot technology (coupled w/a good SPV shock, you could probably hang w/ the VPPs).
Blur - Probably SC's most POPULAR bike, now comes in 3 flavors: XC, LT (long travel), and 4X. There are plans on discontinuing the classic Blur later this year. VPP technology "balances different forces to eliminate unwanted compression without limiting bump absorption". Some swear by the increase in ride efficincy compared to other suspension designs. Downside? More moving parts and perhaps a higher frequency of maintenance, and about $500~$1000 more than the Heckler.
If you go for the Blur, the LT model sounds like your type of riding, but personally, if I were in YOUR shoes, I'd seriously consider the Heckler, especially w/ yagimax's setup in the previous post. In my case, I opted for the Blur 4X because it perfectly suits the riding I do.
Good luck on your choice!