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'Mad Money' Mailbag: Find Your Way in GPS

Garmin and Sirf draw Cramer's enthusiasm, while Trimble trips.

Editor's Note: The following are questions received from viewers of "Mad Money," seen every day at 6 p.m. EDT on CNBC.

What is your opinion on Garmin (GRMN) - Get Garmin Ltd. Report and how it relates to the rest of the sector, like Trimble Navigation (TRMB) - Get Trimble Inc. Report and Sirf Technology (SIRF) ?-- Kathy from California

James J. Cramer:

Hands down, Garmin and Sirf are the leaders in handheld GPS navigation devices. Both companies recently posted upbeat second-quarter earnings results, and I believe they'll continue to gather momentum in the next couple of quarters. On the other hand, I believe that investors should avoid Trimble.

You said that Exxon (XOM) - Get Exxon Mobil Corporation Report lacked growth potential. What if the company simply spent the money it's using for its buyback?-- John from Ohio

James J. Cramer:

What you're talking about is the strategy that


(CVX) - Get Chevron Corporation Report

is employing with its $17.2 billion purchase of


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. I can't say I agree with this direction, either. At this point of the energy cycle, I believe you need to stick with the explorers that have the best growth potential, like

Chesapeake Energy

(CHK) - Get Chesapeake Energy Corporation Report


Southwestern Energy

(SWN) - Get Southwestern Energy Company Report


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