Confused about Switch step-ins

I am looking for a new pair of boots, and I have some old Switch step-ins. I haven`t been snowboarding much in the past few years and have lost touch with the hardware. My Switch bindings were bought in 1996. I`ve been only about 10 times with my own gear. It`s still in good shape though. So I`d like to have as much compatability as possible with my old equipment. I see that Switch has X-type and N-type bindings. I`m wondering if my old bindings are the N-type or what. It looks like the X-type are made for people who want to use soft boots and a high back.
I tried to post a picture last night, but I suppose it was too large and didn`t actually get posted. If anyone thinks they can help me, I can send you a picture of them. The only thing I see on them (without taking them off the board) is "Auto Lock" and "250." I think the 250 is the size, because I only weigh 140. I remember getting smaller ones that were a little cheaper.

the design of their bindings? (The bails on the boot were moved to the inside the binding mechanism, if I recall correctly; whereas they used to connect on the outside of the catch.)
Your bindings may not be compatible with current boots. (But I may not be remembering correctly.)

FWIW, my 3-year-old Vans boots fit both the older and newer binding bails. I don`t know if current models do, but there`s not a huge difference in size between the two.

mechanism. The X-type is the base integrated w/a heel cup and highback, so you do not boots that have a built-in highback to be able to ride properly. The lock-in mechanism looks exactly the same, but you will want to purchase a boot with an integrated highback if you don`t want to change your bindings. too bad the switch website ( http://www.switchbindings.com ) is still under construction, cuz as of last year they still sold both types.
Locally (in Greater Vancouver, BC, Canada), I don`t see much of switch bindings this year. It`s not getting any better. I think most are last year`s stock.
So far, I am not having any troubles w/my step-ins and I like them. Previous to this, I was renting and were using rossi`s step-ins. I don`t feel much of a difference between straps and stepins when i`m attached to the board. These feel tight when they are locked in.. there is no "give" between the boot and bindings. The only thing (which maybe over time I will master) is the highback does get in the way when I`m getting into the binding. If only the highback could move back more when it`s in the "get in/out" position.