The RODEC MX1800 is probably the best sounding analogue Dj mixer I heard in the last 20 years. Lots of details and surprising 3-dimensional crisp mids and vocals. Typical fast RODEC bass.
The USB-Input-cards can be bought as an option and can be retrofitted easily. Nothing special these days. Any Guitar shop has this USB-units on stock from various manufacturers. I dont need it - I dont have an iPhone and I dont want one!!!