Depends on what you like and how much you want to spend.
I've put several Grant leather/aluminum steering wheels in my pre-'95 GMT400's and really like them. You end up around $250 invested in the wheel and the much nicer billet aluminum adapter kit vs. the ugly rubber boot thing that comes with the wheel. Most of their wheels are around 14" vs. the stock which is like 16".
Any quality wheel replacement will have horn attachment parts so you don't lose that functionality.
I'd skip the cheaper wheels; that vinyl-coated foam rubber crap doesn't hold up. The leather on my Grant wheels held up very nicely over the years with literally no attention whatsoever.
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Man, the flash really washed out the gray on the one in my old '92. In natural light it matched the interior much better.
Richard