I'd go with Garmin for the Radar and GPS, as they've got some of the best gear out there IMHO.
For wind, depth, and speed, you could go with any number of companies, but I happen to like the TackTick gear for versatility and ease of installation.

No running wires up the mast.
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Sailingdog
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Telstar 28
New England
You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
If you're new to the Sailnet Forums... please read this
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Still—DON'T READ THAT POST AGAIN.