My best playing experience with a clonewheel that was almost exactly like playing a B-3 is Hammond's XK-3c. I had a B-3 (with two Leslie 147RV) for quite a few years, and the response of the XK3c's keyboard and feel of the drawbars is just like playing the old "B". I felt right at home with the touch.

Of course, you may be looking for a dual manual organ to go along with the pedals...there is an optional lower keyboard. pedal board and appropriate stand with the XK3c, but it isn't cheap.

Nord's C2D is very nice, and it's response is very similar to the XK3c, with the latter having a slight edge, in my opinion, but the former has two manuals, and a very decent simulation of drawbars. Both on-board sims sound very good, although the Neo Ventilator effects unit appears to be the current sim champ.

Certainly, all this will depend on how much you want to spend, Frank.

Chas has pointed out some info on Keyboard Corner, and it is probably the best place for you to get opinions and reviews on other models.

Ian