@djomre
i love my X5000, but if you're new to NG, i'd highly recommend you try AOS4 via UAE first, even though it is terribly slow in comparison, just to make sure you like it. the X5000 is not cheap, but for me, it's massively worth it. i can run all the 68K software i love, new software like sketchblock or digital universe; play HD videos and stream internet radio; and play great games like huenison and MACE.
it's not perfect. i would have preferred support for USB3 -- although that's more an issue with AOS4 than the X5000 itself. and there's no dual video-card support at the moment, so i can't drive more than one display. i'd also like to have more than one x16 PCI-e slot. all that said, though, the performance is awesome. the expansion options are great. and i love AOS4 and the native and 68K software that i can run on it. so i'd say if you have the spare cash, you'll love it.
any other X5K owners wanna chime in here?

-- eliyahu