“How much does the small frame weigh, do you need a lock out shock (as I’ve had on other bikes) or does a cheaper shock without work ok without bobbing?”
I’ve got a 2011 X2 (small) but sorry I haven’t got a clue how much it weighs, but its a dam sight more agile and light feeling than my old full susser which weighed roughly the same when you picked the 2 up side by side.
It doesnt need an RP23 shock, the RP2 is just fine, and I have never suffered from bob (80kg)
I think the top tube length is average to be honest, certainly not half as long as other racey bikes I have ridden, so I cant see why you would want to put a shorter stem on unless you have really short body/arms?!
Personally I think the 100mm travel all round is perfect and the bike is very well balanced. I used to ride a 130mm travel and in many ways the Anthem is much much better than my old bike, as has been said above, the bike feels like it has much more travel. The only time I notice the difference is on high speed decents when the front end gets very slightly harsher (thats not the same as running out of travel)