Going from the 58 to the 57 will probably sound "warmer", you may prefer it you may not. 57's can mike high volumes, guitar amps and drums, so they are less sensitive than 58's. A good Shure that does both fairly well is the Beta 58, I've used them for years for both vocals and miking acoustics.
Condensors are the next step up, I just got a Beta 87A primarily as a vocal mike but it surprised me how well it miked my D-18GE.
With microphones it does hold true the more you spend the better they are, up to multithousand tube setups. If you can overcome the phantom power issue the Beta 87A really does sound better than the 58's. Good Luck.
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