Originally Posted by
illenvillain
53cm and Im 5'8 with 81-82cm inseam
This doesn't really mean much but I'm 5'8" with an 81.5cm/32" cycling inseam. I ride 54.5cm-55cm top tubes with a 120mm 0 degree stem. On the surface, it sounds like you might be riding a frame that's a little on the small side. I'd really start the fit there as opposed to stems, longer reach bars, set back seat posts & the like.
As far as the short vs long stem quicker/slower handling thing, take it with a grain of salt. I understand the science but in reality it just doesn't affect handling. Head tube angle, rake & trail do.