Can someone tell me the OS X alternatives to mail.app? I am almost tempted to use Gmail for its great search engine and interface, but I am hoping there is a client I am unaware of on OS X that works better than Apple's mail.app. I've heard good things about Postbox 2, but the price is steep and I am not happy with the way the company handled the recent upgrade to v2 for current v1 users. Any other suggestions? I would like faceted searching and an intuitive look. My email accounts are all on my email server and I use IMAP. Thanks!