For current practical use, it's hard to beat
Zoom H4n. 2 XLR/1/4" combijacks in with phantom power, plus 2 onboard coincedent mics adjustable for 90/120 degrees. The combijacks can be configured as a high-z input, and a 3.5mm stereo mic in, which disables the onboard mics. Supports up to 32 gig SD cards, although 16mb is plenty. 4 simultaneous tracks recording, as long as 2 of them are the onboard mic or a stereo mic. Stereo resolution can be set for everything from MP3 real stupid to 24bit/96kHz Wav. Exports Wav. or MP3 by USB, and can rip WAV. to MP3 onboard. In 4 track mode, it is 16bit/44.1kHz with onboard EQ, compression with all the parameters, reverb, amp and cab models, and a slew of assorted FX. It can also be configured as a USB powered interface, recording direct to computer, supporting most audio editing software, and comes with Cubase. Available remote control card and mic stand mount adapter. The only fx in stereo mode is rudimentary compression and a rather effective limiter.
It can be configured for economy mode, which extends battery life, and has separate configurations for alkaline/lithium batteries and NiMh. In short, the little bugger rocks. Good metronome, kind of cruddy guitar tuner.
One caveat emptor- It's predecessor, the H4, does all the same stuff, for less money, very badly. The switches are low quality, the limiter is in the wrong place in the signal chain, and it's fragile. The H4n seems to be a deliberate attempt to correct everything that was wrong with the H4. It can make really good recordings, especially when it is fed with higher end mics.-Richie