Traffic warning devices

Does anyone have any experience with one of these devices?

PCAS XRX $1795
PCAS MRX $549

Is there enough value in XRX's ability to show direction?

Last year I flew a plane from NH to PA. I had a Garmin 430 with
traffic. I was at 8,000 feet and about 80 nm west of New York City
when the instrument warned me about a potential collision with a fast
moving aircraft. I had to dive to avoid collision and with my family
on board it was not a good experience. The worst part was that I was
assigned a transponder code and I used flight following. It seems our
ATC is quite broken these days.

Anyway, I am looking for traffic warning device for my glider. If XRX
is worth the price I will buy it, but in a glider I am not sure it
makes a difference, especially while circling. Please share your
experience.

AK