I understand, but look at the life cycle of the Surface. They are about 13-15 months. The SP2 underwent a tiny upgrade from a 4200 CPU to 4300 mid cycle. If you do not
neeeeeed the thing right now and the current device is doing what you need, then wait until you really need it.
I was in somewhat of the same situation, but I was hoping that msoft would continue with the SP2 as I liked the 10" form factor as a Tablet better than the SP3 , 12". I was perfectly happy with my older Acer i5-10.6 laptop waiting to see which way msoft would go. Once I was sure the SP2 was dead in the water, I then bought a new (old stock) i5-SP2 and am very happy with that decision, even though it cost me the same as a current i5 SP3.
My issue was an "I want" more than an "I need" thing.
Only you can decide that. You are
always going to get both sides of argument when posing a question such as you have and that still leaves you to make a decision. If you want to skip any buyer's-remorse, don't ask here. If you feel you must, then don't read any replies.
Old Army saying: Lead, Follow or get out of the way.