[LAU] omni mic recommendations

An omni condenser mic seems a good tool. I've got cardioid and super and hyper cardioid, mostly dynamic. I've also got a limited budget and mercifully low production standards. I'm considering * AT8010 : $150 ; specs 20-20K, 123dB SPL * AT4022 : $350 ; specs 20-20K, 146dB SPL TheAT4022 price is too much for me, tho' if people really love it, I might save up for it. The AT8010 price is do-able for me. I don't need high SPL. I need a mic on a stand with shock mount that captures various instruments, single vocalist, multiple vocalists, and general room sound into a Linux (Ardour) system, mixed and played back to CD standards. Will the AT8010 do? I've noticed that there are sound level test mics that are omni and have about the same specs as the AT8010-- would one of them do? I'm open to any suggestions for an omni, tho' I'm dubious of dynamic omnis. (do what? capture sound without the proximity effect, with at least 60dB above noise, no obvious color, generally getting a room sound or a drum kit that most CD listeners won't mind.) Hopefullly, with thanks, jim