I got the hx3 with drawbars just after jan 1, and I really like the sound and the drawbars. Unfortunately, I don't think the split function is very good with a single 73 or 76 or 88 note controller board. The reason is that if you press any key outside of the 61 key (5 octaves + 1 note) range of a classic b3, that note will be immediately shifted up or down an octave so that it falls within the 61 note range, so you always get a discontinuity if you go outside the 61 note range.
(At least you do get a note, which is a big improvement from the previous version, 3.91, where those notes did not play at all).
I have a 73 note Nord electro 2. It goes from F below the b3's low C up to F above the b3's high C. So on the top end, the notes C# to F are all just shifted down an octave to get them back in range. If I do a split with the lower half shifted up an octave (so I can comp with the left hand), the lower half is shifted up an octave as it should be. However, the 7 bottom notes, from F to B below the B3's bottom C, are all shifted up an extra octave, which is disconcerting to say the least. These tones actually exist on the instrument, but the logic of the split has a flaw, and they are shifted once because the physical keys lie below the b3's lowest keyboard C, and then they are shifted another octave because the split has an octave shift.
(this last problem can be avoided if your controller keyboard can do the split and octave shift so that the hx3's flawed logic can be bypassed).
Tom has said that Carsten will fix this and implement tone wheel based fold back (where just the tone wheels that are out of range are folded back, instead of the entire note), but I would advise anyone planning to use the split function to wait until this is fully implemented before they buy a unit. Hopefully that won't be too long and I look forward to editing this post with the good news when that happens.