Squeezebox touch is great entry and easy to use.
I love my PS Audio Perfect Wave DAC and bridge (wirelessly fed hi rez files from a usb hard drive that connects to my Netgear wireless router). Use my iPad and "elyric" app to run all music.
This is my first foray into hi fi - way above my expectations, but still entry level for some here!
My old system - a circa 1989 Nakamichi TA-1A, NAD CD player and Snell K types kept me rockin for years, but it could never stand up to well recorded classical music, and I always knew jazz CDs were just god awful compared to my dad's records I grew up listening to. I started to explore... and caught the bug.