I only have an ET9200 STB...so not the latest. But I can say viewing LIVE streams on an HTPC is like night and day compared to a STB. My HTPC plays LIVE streams like butter...awesome for sports!!
My HTPC (including Silverstone case) cost about 450 Euros, but well worth it in my opinion. If you enjoy LIVE streaming, there is nothing better...endless sources/plugins.
I'm still debating whether to upgrade my STB or add a DVB-C card to my existing HTPC with DVB-s2 card. In my opinion, LIVE TV functions are better on Enigma2 boxes(pause/rewind/FF/slow motion) I use TVHeadend, channel changing times are fast, but rewind/pause/FF are still hit or miss.
But LIVE streaming is a trillion times better on an HTPC.
Also, adding/configuring channel lists are not as convenient on an HTPC... I haven't found a way to use DBEdit with HTPC.
Just my 2 cents.
Hope this helps.