Thanks for all your comments guys, the stems I'm considering are :
V!Z Forged OR Welded (Tell me what you think is better and why)
Try-All 3D Forged with Top Cap (Maybe a little too expensive for first time trying a different stem)
Trialtech Race OR Sport Forged (Which is better and why?)
I'm probably going to go for a long and low stem, or a short and low stem.
Ask me any questions you feel is required to find out any more info which will help me decide, thanks!