I've heard positive things about the Whites TRX... but again, reviews are reviews. I was pretty dang hard on my black Garrett pointers, and was happy with my orange ones. Had one go bad just this month, though, and sent it in for warranty service. Dunno what went wrong, but it just stopped detecting (though it would beep and vibrate through all the settings). I expect it back in a week or two. The failure was after over 700 hours of field service, though, so it was no slouch.
That being said, I've tried several other cheaper brands (Harbor Freight, Bounty Hunter), and even a Deteknix pin pointer (which I thought was lousy for detecting, since it wouldn't "tone" in contact, or get more rapid... I always felt like I had to SLOWWWW DOWNNNN when using it.).
I often wonder though, if my warranty service is required because I USE them heavily. Probably close to 800 hours of field time a year. That's a lot of button pushing and swirling in the dirt.
If I were to ever switch, I'd probably try the TRX.
Cheers,
Skippy