I've owed the i2, i3, G-core, 314-2, OB classic, and I've used an Ob 1, 2, a pred. z2, and OB classic pro. in my opinion the i2 i3 where ok and thats it just ok the G-core is junk i would waste your money, the 314-2 was a good low deflection shaft but no feel to it at all you just couldn't get a connection between you the shaft and cue ball. now the OB classis is a very nice shaft good low deflection, its has a good feel to it and a solid hit which i prefer, the OB 1,2 are shafts for people that like low deflection and thats it i didn't care for them because the feel to whimpy probably due to the fact there hollow almost the whole length of the shaft. The Z2 is a good low deflection shaft but again no feel its hard to explain really. Now the OB classic Pro is a very good shaft really low deflection, lots of feel and solid hit i was using the shaft for a couple weeks until this last weekend and i didn't ever really care for an 11.75 shaft I thought it might be to small but i couldn't really tell the only thing i had to adjust was the amount of english and forward spin or draw you don't have to use a lot with this shaft to get what you want in all this is a very nice shaft and recommend it. but I've told you about the SS360 shaft and have heard really great stuff about them and thats what i went with and can't wait to get it. so i hope this helps a little