I've tried a bunch of ROM's Myn, Calkulins, Sprint Lovers, CM7, CM7ex
They each had pluses and minuses.
But then I tried this recent one from NonSense.
It has a bunch of nice GingerBread apps but is still based on the stable Sprint Kernel so 4G, GPS, EPST all still work fine. A Hybrid between Froyo and Gingerbread.
Check it out. Sorry he does not post on PPCGeeks.
[ROM]EVO-NonSense(UPDATED 1/22-Gingerbread Elements,OTA 3.70.651.1 - xda-developers
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EVO 4G, Stock Sprint ROM, ProClip in Car, Sony HBH-300.