Mountain Biking - Chain Guide

i need to get a chain guide, i was wonderig if you guys have any sugestions as to what you've had luck with. My chainrings are 42, 32, 24 any help much appreciated

You want one that still supports all three rings?

i'm looking for suggestions as to what you've had luck with, ideally i'd like to keep all three, but if need be change it

Well, first off, you will have to lose the 3rd ring. It gets replaced with a bashguard. There are some guides that allow the use of the middle and little rings, like the E.13 DRS (Dual Ring Security), and the MRP LRP(Long Range Patrol). You would probably want to buy a larger ring to replace the middle too. You also need to check if your frame has ISCG tabs, which are little tabs around the BB shell that are threaded, and make mounting a chainguide simple. If your frame does not have ISCG tabs, you will have to get the BB mount guide.

I am running a Gamut P40 chainguide, made by a small company up here in NorCal. The E.13 SRS seems to be quite popular with its bulletproof bashguard.
http://www.universalcycles.com/shopping/product_details.php?id=320&category=364

Here is the DRS
http://www.universalcycles.com/shopping/product_details.php?id=322&category=364

Here is the Gamut that I run
http://www.gamutusa.com/detalle_product.asp?id=6

nope no ISCG tabs. i was looking at Gamut, and the e thirteen the other day

E.13. I run a DRS on my trail bike, and a SRS on my DH bike. Both have been bullet-proof. No ISCG tabs on my Kona, and the DRS performs fine.